Finally, my new upcoming game is done, been in progress since January 09. In creation for almost over 3 months now. It's fanmade take on Geometry wars, sporting the same grid and particle system. You can see an early version in action here, when it used to be a direct copy:
http://www.youtube.com/watch?v=eEtANLT 6dW0

The look and feel has been changed since then, with the addition of RPG elements such as upgrades, and a few extra features. The game's finished, but will be making appearences elsewhere first. It will be released on NG in about a month. Here's a small pic of the new version in action, showing off a bit of the grid warping (This is an early pic taken about a month ago):