I received my TP2 yesterday (freakin love it) and have tried to use windows mobile player too. You're right in that the stream is choppy. On mine it says the playback is coming in at around 50kbs. I have a really good signal here and average about 700kbs on EVDO RevA, not to mention Wifi. It worked fine on the Touch Pro. It seems as if someone has somehow limited the streaming throughput using mobile player. Is that even possible?
My workaround for the moment is to change the stream settings in Orb to use one of the .3gp variants. This will cause the TP2 to use it's streaming media player and the playback is a bit better but not nearly as sharp as it should be. Also, Kinoma Player will stream video through Orb and the quality isn't too dodgy...but no TV
I would love to know if anyone else with a TP2 has Orb working with windows mobile player because the quality should be better.