Ethan points out Yelp doesn't have events in their database. Of course they don't. They just launched it. Ethan says his company has lots of events because they are focussed on creating a search experience. True. They do a good job there.
IMHO, you need both a big list of events and you need a comunity. Yelp seems good at creating a community or atleast throwing a party. Ethan thinks search is more important.
A long time ago, I and a lot of other people, stopped comparing my startup to these companies chasing consumers. Obviously, WhizSpark hasn't focussed on search. And our community isn't that large or geographically dispersed. And we're focussed on business networking events and events that have a financial purpose for being. We provide a service that provides value to event producers, businesses and individual business professionals. Things that they are willing to pay for. But, every startup founder has a sweet spot for his own startup. Mine is certainly not better than any others. In fact, there are so many unique approaches being pursued, it's really cool to watch. When we started, there certainly wasn't anywhere near this amount of innovation. I welcome Yelp to the party. It'll be interesting to see how their service evolves when they begin to care about generating revenue.