flickr browsing on ipad...
...is just amazing.
First, you can easily browse using regular flickr.com, don't need to use the mobile app or mobile optimized site (m.flickr.com), can just use regular old flickr. And then lightbox mode is the same as on iPhone, except that you obviously can see way more, and it loads a higher res image, so you can gesture through the stream and zoom, and it's all really just... the best. lol
I think this is now my preferred way to browse around flickr.
*(obviously I had to use my own stream for this photo example...) lol