I updated my Flickr Rainbow applet to use striatic's suggestion of hyperlinks for the thumbnails. I also made a grid view; you should click on the applet background to give it focus, and then hit any key to switch modes.
Update: I made the same thing but much faster. (For those interested in Processing, the speed-up came from abandoning image() and moving to replicate() which is much faster in 2D.) The latest Flickr Rainbow applet is now here.

Flickr Rainbow
Originally uploaded by Just_Tom.
I made an applet called Flickr Rainbow to illustrate the latest images from Flickr tagged with colours of the rainbow.
It's made with Processing, but it also needs a bit of PHP to break out of the Java sandbox. The PHP is quite short - one file relays a Flickr API request via my site, and the other fetches a square Flickr thumbnail image given an id and an owner. Hopefully they aren't too insecure!
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