JAIPHO is a web based, iPhone optimized gallery that was inspired by the iPhone photo app. It emulates the original app quite well, including slide efect and finger gestures. You can switch from full screen mode to thumbnail mode with one touch, or set to autoplay a slideshow.
This is the Beta release. It’s released under LGPL, so I expect we’ll see this evolve fairly quickly. I’d like to see some image effects in the slideshow, or the ability to point to an image library or rss. Definintely check out the demo when you can!