Card Hunter
http://www.cardhunter.com
Browser-based game in which you can either play single-player campaigns or in PVP. You need an email addy to sign up, but other than that, it's just pick a name/password and go for it. If you go to Tools > Page Info in Firefox, the client itself is the .swf file, so at least you don't have to go rummaging around with the swf dumper or anything like that to find it.
Anyways, looking for hacks possibly to do with loot quality or a way to get the AI to skip its turn, something like that. Looked through the swf myself, but it's much bigger than I expected, and I haven't found anything worthwhile yet.
- SJ
EDIT: Also - look, Tim! No [Request] tag in the title! Hooray for paying attention to site announcements!