Was it the anniversary of this tweet?

Aug 7, 2007: My buddy Steve Searer is keeping things rolling over at http://officesnapshots.com/ He is already up to 26 companies!

I think if you had stuck with only "Web 2.0 Startups" your initial audience's interest would have fizzled out eventually. It's brilliant you were able to pivot to an audience with a more professional interest, an endless stream of content, and better advertising opportunities.