Just a wild guess, melothria scabra ?

I believe that's the creeping cucumbers oh wait maybe not. Hmm these are bigger than grapes. I'm starting to think that it may be dosakai melon cucumber?

You got me! But now I really hope this mystery is solved. Surely one of our resident experts will come along shortly.....

This forum isn't wildly active, so if you don't get a response here, you might try the Name that Plant forum on GW.

Britteny, try posting another thread like this in here, like NHBabs suggested:

http://forums2.gardenweb.com/forums/namegal