We had been using this on a few of our side projects for a while now (since Amazon introduced custom origin servers on Cloudfront) and figured maybe it was something others would find useful. The systems is modeled after a similar system we used at Yahoo. Right now we're not charging or anything, just want to see if people find it useful before we expand. Let us know if you have any questions or have other features you'd like to see added.
Cirruxcache [1] recently added the same capabilities. It's open-source and piggy-backs on Google App Engine - double awesome.<p>[1] <a href="http://code.google.com/p/cirruxcache/" rel="nofollow">http://code.google.com/p/cirruxcache/</a>
Guys, seriously get rid of the grey on grey on grey action. Your site is nearly unreadable. I recommend you talk to @limedaring, she's a remarkable designer, was my cofounder, and has done great work for several YC companies.
interesting . . . I was thinking of a similar idea last year, using nginx's image filter module (libgd) <a href="http://wiki.nginx.org/HttpImageFilterModule" rel="nofollow">http://wiki.nginx.org/HttpImageFilterModule</a>