Some friends on Twitter came up with a great idea: convert a photo site to have a layout like The Big Picture. I'd love it for Flickr, Posterous, Tumblr etc.
Someone could probably build that with a greasemonkey script really fast.
http://twitter.com/ibeching/status/2047379234 http://twitter.com/hartsell/status/2049714995
It would be cool to see someone here post a solution. It would build some cred in this community.
On a meta level, if you like the idea of posting requests or seeing them done, make a "request a hack" yourself.