This Wednesday I submitted my first Silverlight 2.0 (final release) game to Silverlight.net late at night. Already the next day it was up there, great! 
The basic concept in the game is to "pop" as many bubbles as you can in 30 seconds, pretty simple. The best thing is that it also has a hi-score, which means that you can fight to become the "Bubble Master aka #1". The game is a complete rewrite of a similar game I did in Beta 1 and Beta 2.
You can play the game directly on my site here: http://silverlight.laumania.net/bubbles/
Or you can get to it through Silverlight.net here: http://silverlight.net/community/gallerydetail.aspx?cat=sl2
I'm planing to release the source code for it, I just wanted to add some minor fixes and changes to the game before that. So you should be able to find the source on my site here, and on Silverlight.net in some time.
Enjoy!