Ignite provides a sweetly earnest kickoff to Web 2.0 ExpoO'Reilly publishing has set up the company's annual bazaar of of bizarre business models at the Javitz Center in Manhattan, but the festivities truly kicked off with last night's Ignite PowerPoint presentation spectacular hosted by O'Reilly Radar's Brady Forrest and Etsy's Bre Pettis. Pettis and friends used fourteen pounds of butter to bake 300 cupcakes and tubs of frosting, which partygoers were invited to decorate as part of a contest — the winners, Nick and Danielle Bilton, crafted the iPhone application icon cupcakes pictured here. Deb Schultz, a Six Apart veteran, did an Alley vs. Valley routine, noting that while in the Valley code is king, in the Alley folks know how to dress. For fellow Alley expats in the Valley, "You know you've gone native when you're wearing a sweater with flip flops." Case in point? Flickr developer Cal "Don Juan 2.0" Henderson wasn't wearing a sweater, but he did look to be wearing the same cargo shorts and flip flops that he was last spotted in. (Photo by Dan Lurie)