Not that iv heard of at the moment, but their are loads of these multi-touch technologies popping up now which are all software powered...
I cant for the life of me understand why the Mac touchpads had to be a physical thing... the pad itself is already psudo multi-touch due to its ability to allow two finger scrolling and right click with two fingers... Iv always thought if it can detect two seperate touches, it must just be a case of telling the Operating System what different gestures mean !
Which is how all the software driven systems work, the software interprets the users gestures and performs the appropriate action...
I was kinda expecting some kinda 3rd party or hacked app to come out for some time, but nothing has appeared yet, but saying that multi-touch is still kinda in its infancy in this style of implementation (but that didnt stop Microsoft Windows 7 jumping on it lol)