Best for video calling between Droid and Palm Pre

I have a Verizon Droid 2 Global and I need to find out what we can use to video call that will work for both my phone (yes I know the camera sucks for this but when you see each other only twice a month, anything will work!) and a Sprint Palm Pre. Any suggestions? It would also be nice if I could use it on my webcam at home and still get to his Palm Pre.
Thanks!