We don’t frequently pay mind to the world of adult-natured business on the Web. Only on occasion will we see what’s going on in “that part” of the networked world. For instance, sites like Zivity and AdultStumble have crossed our desk for brief moments in the past, and we’ve said as much.

You know where this is going. We were made privy today to a little mashup called hookupmaps. In short, it’s Craigslist (the 18-and-over part) meets Google Maps. And while the place may not behoove us to immediately toss out the NSFW item, the flag will need to fly soon enough. Once you begin browsing around, really. If you being browsing.

Roadways in parts of New York City are having their annual crisis of non-motion, a result of the gathering of the United Nations General Assembly. So what better time for the utilitarian folk at Google to ply the five boroughs and areas beyond for all manner of details concerning the mass transit options of the region?

While Google Maps is an awesome application, it has its limits and can sometimes be a pain in the behind to transfer addresses to from other websites.  Luckily, there are a slew of Firefox extensions that can help you turn Google Maps into an even more powerful tool.

As we always warn you with any list of Firefox tools, please do not install all of these at once unless you’d like to slow down your browser.

Advanced URL Builder - Lets you set the first part of a URL, such as Google Maps, and then you just highlight a zip/postal code, right click and choose Google Maps to be shown that location.

When you watched The Goonies for the first time, did you start digging under porches and searching hollowed out trees for buried treasure? What if Chunk truffle-shuffled his way to the treasure with a GPS and exact coordinates? Seriously. How much easier would that have been?

If you’re not familiar with Geocaching, it’s a treasure-hunting game based on the community over at Geocaching.com. Their website boasts that Geocaching is “the sport where you are the search engine.†According to Wikipedia, Geocaches are currently placed in over 100 countries around the world and on all seven continents, including Antarctica.

Editor’s Note: This post is part of an ongoing series at Mashable - The Startup Review, Sponsored by Sun Microsystems Startup Essentials. If you would like to have your startup considered for inclusion, please see the details here.

STARTUP DETAILS:

Company Name: UMapper

20 word description: UMapper is a visual, universal, Web-based map authoring application that makes it easier than ever to create maps.

Globme, a newly launched service that is described by its co-founder and CEO, George Lee, as “a lifetime organizer,†is being introduced as a private beta. And its youth is noticeable.

There are several parts to the Globme puzzle. Visit the home page, and you’re shown some of the most active profiles. When looking at a user’s profile, there is a timeline at the top, with screen name to the left as well as links for ‘Contacts’ and ‘Archive.’ Neither of those components, however, are functional at present.

Google has announced a new feature of Google Maps called MapMaker, which allows anyone with a Google account (therefore, everyone) to edit Google Maps. We’re not talking editing your or your friends’ version; we’re talking about the real thing. You can now edit and moderate roads, lakes, parks, POIs, cities and other local features as you please.

Of course, there are several restrictions to this feature. As Google puts it, “To ensure high quality data, we allow map editing only when you are zoomed in really close, and some of your contributions may be moderated. We also recommend that you switch to hybrid mode to add/edit features precisely.”

Google Maps mashups have been done and re-done… and done yet again. There is even a Google Maps social network with YouTube videos that is slowly evolving.

But apparently the hype is not over just yet.

TravelSkoot is a new Google Map mashup site that allows users to “skoot” or plot points on a map that show travel plans, tours, or favorite places. A skoot can be created for places you’re going, places you’ve been, or places you want your friends to visit. You can even search skoots created by other users who have toured around a certain city. Already on the move? TravelSkoot can also be viewed on WAP enabled phones.

Here’s the moment all you map mashup junkies have been waiting for: Google Maps for Flash is now available for development through its new API. What a maptastic week it’s been. Flash graphics can be used for each title layer, maker and information windows, meaning you can create more dynamic map mashups. Even throw in some animation and video.

For the user experience, however, the smoothness for things like zoom and drag functions are likely the most important new features to get excited about. For developers, it’s important to note that Google has split the interface and implementation, so you can build against the current version of the API, and future updates will be automatic. See here for more details, and see here for some Google Map mashups worthy of time-wasting.

Google has made quite a bit of progress with its StreetView initiative. The company has mapped out numerous cities around the US so far, and it’s expanding its reach on a continual basis. But cameravan’s lenses are usually only focused on the stuff that can be viewed at or near eye level. Which can be a bit stale, particularly around areas of architectural significance. So Google’s decided to do some second runs, as it were.