Best thing to do I think would be to fork the project, mecurial allows you to do this really easily and submitting changes will make this easy.
Yes I do accept contributors and would love contributors.
I need help mostly with styling, I know my styling skills are terrible!.. -0
Also I am dumping ideas out to here
http://orchardforums.codeplex.com/discussions/265792 so if you want to pick up something from there or something else and run with it go for it :) - I havent started anything new so just let me know so we arent duplicating functionality.
The architecture of what is currently there is based directly on how the orchard team have done their stuff thus allowing the code to be picked up easily.
Sound Cool? Look forward to seeing what you come up with :)