I have been giving all this Zombo challenge a lot of thought lately and have come up with an idea which will include rhythm and lead?
It will be a drum backing track with bass only lasting 2 minutes you should include rhythm guitar and a bit of a solo in it!
Each participant will record his part then load his track up and we will vote whose we like the best!
This will enable you to work with loads of freedom let me know if you like the idea of it or not? At the moment its only a suggestion I would like your feedback on it ?

Cheers Zombo