I've released a beta of hackxor in the hope of getting some feedback on it so I have time to implement changes before the final version in May. It is roughly similar to DVWA but quite a lot harder. More details/install instructions at
http://skeletonscribe.blogspot.com/2011/02/hackxor-hacking-game-beta.html

I expect you lot will find the first few sites pretty easy to crack through, but it gets a lot harder after the ISP.

I've finally finished it. The first two levels can now be played online with no download/installation, at least until someone DOSes it and sourceforge gets annoyed.
[hackxor.sourceforge.net]

If you can't be bothered with the whole 'plot' thing but like the sound of a moderately tricky SQLi challenge (easier than LightOS's but non-trivial), jump straight to the second level:
[hackxor.sourceforge.net]

Thanks to the guys in #slackers for answering odd questions for the last 9 months.

Thanks for taking the time to put this together. I'll give it a try sometime this week! :D