anyone want to develop a jam?

I've just put a simple drum loop and bass loop on tape (showing my age) and started jamming to it. I like it and would like to make it into a little bit of a jam and I was wondering if anyone would like to help me structure it. It's just a simple rock riff that I slapped in direct (has a terrible buzz on the guitar which I'll have ground out) with three basic progressions in Drop D. Any drummers, bass, guitar ,keys ,or vox wanna help?
 
http://www.soundclick.com/bands/default.cfm?bandID=805324
 
Al