It will be interesting to see how scyber's PlayOn channel holds up against MediaMall's constant revision of its PlayOn software. Currently, according to scyber, the PlayOn channel will only work or was only tested and found to work with PlayOn version 3.0.19[.1216]. Hopefully scyber's PlayOn channel will also work with future versions of MediaMall's PlayOn software.
I installed PlayOn yesterday, and I think it's already beyond that build if I remember correctly. In my short amount of testing, I had success with Hulu, CBS, TV.com, PBS Kids, and SyFy (script), but couldn't get Comedy Central and a couple others to work. Not sure if that's specific to the build I was using or not. I didn't get a chance to try the My Media feature.
Overall, I was pleasantly surprised by the performance of Hulu. I installed PlayOn on my HP MediaSmart Server (EX490), and Hulu worked pretty well. There were a few stutters and audio got out of sync for a few seconds every once in a while, but I think that's probably more a result of the marginal computing power of the EX490 than the Roku PlayOn channel. The two or three episodes I watched on Hulu played to completion without any rebuffering. The CBS and SyFy shows I watched were not quite as good -- got several rebuffers and the PQ isn't as good.
Again, overall it worked fairly well. It would be nice if the channel was a little more responsive, so hopefully that can be addressed.
Thanks for providing this channel!