I know this is an old thread. I've been doing some vector work on some of the characters and stuff from this thread. I'm just doing it for fun and some nice backgrounds don't worry I know they're your ideas.
here's a couple (they're huge):
http://farm3.static.flickr.com/2471/3842023384_a28fcf0118_o.png
http://farm3.static.flickr.com/2489/3841231509_b90b09fa0b_o.png