I've posted before about PlayOn being the source of video for my kids around the house on their iPod touch devices working "OK" as long as they stream MP4's (but transcoding got choppy), and many folks have commented about Boxee's NHL Gamecenter Live video stuttering.
Those issues are now a thing of the past at my house.
I upgraded my PC running Boxee and PlayOn for $169 to a much faster setup and its paying off.
I chose the AMD Athalon II X3 445 Rana 3.1 GHz processor because it has the best price to performance ratio I could find. I then paired it with a low-end overclock and core unlock board from ASRock (the N68C-S UCC board) and 4 Gig of Geil DDR3-1066 RAM.
Unfortunately for me, I couldn't unlock the 4th core (but I haven't given up yet), but I did successfully overclock it by 20%.
Streaming and transcoding via PlayON are much smoother now, as is the NHL GameCenterLive (in Boxee and in the browser).