We've reached the halfway point of 2008, so time for a half-year assessment of the Internet bigcos. Below is a poll, asking for your picks for best bigcos so far in '08. We did a similar poll last July - and Facebook just edged out Google for the RWW popular vote. At the end of '07 we named Facebook our Bigco of the year. We also ran the poll in 2006. Note that this poll is multi-choice, so select only the companies which have impressed you.