Flickr has had 5 or 6 major updates this year, including a rebuilt uploader, redesigned photo page, a new justified view, social album browsing, integration of a new photo editor, and more. So, there is a lot of work being done at Flickr. See announcements @ http://code.flickr.com/blog/

If there's anything specific you'd like to see, leave a reply.

A much better iPhone application. I think there was a whole article about that.