Just to let you guys know, Vanilla is licenced under GPL, the same as e107. That means you can do more or less what you want with it and please do! Modify it, redistribute it, sell it... whatever you want, as long as whatever you do with it it is also released under GPL.
Have fun with e107B00tstrap ;)
EDIT: Sorry! I would have left this as an answer if I knew you needed a magnifying glass to read the comments!!