Turbocharged: I just read all 18 pages of this thread and there's some great info in here. I've owned my PlayTV since December 09' and it has been excellent so far. I upgraded the HDD on my PS3 to a 160GB WD Scorpio Blue about 6-months before I bought PlayTV and haven't experienced any serious stuttering etc.
If there is one thing I could change however, it's that there could be an option to record a scheduled recording ONLY on weekdays. Currently if you set up a recording to repeat daily, it will also record on Saturday and Sunday, which can be a pain. Apart from that I've really enjoyed owning it so far. Looking forward to when it officially launches in New Zealand so that it can get the proper software support that it deserves.
Turbocharged: I just tried the Remote Play feature with PlayTV through my PSP and it worked extremely well. I connected via my wireless router so I was worried that there might be some stuttering etc but it was very smooth and clear, just like watching it on TV. Would be very handy if I was away on holiday somewhere, particularly if there was no TV.
Here's a photo (don't mind the black spots on the screen, that's just from the camera as I was using a polarising filter) -