Investing without own cash/credit?

[Pauline Wright]

There a few R.E. "gurus/real estate groups out there that are offering CASH for real estate deals if you don't have any, i.e. Cameron Dunlap, ProsperUS, and of course the "use our cash" or whatever it's called. It is obviously a great idea for anybody to get into investing, but what I am trying to find out is WHICH OF THESE CO'.s are actually any good?

Thanks