For my planned usage of a UMPC the Q1 is currently still my choice of near future purchase over the Q1b or the TabletKiosk. I will be purchasing the UMPC as an entertainment unit with occasional use for "work".
It will be mostly used for audio and video playback, photo viewing, ebook reading, TV streaming with a Slingbox, and internet access. Secondary usage may be GPS navigation in a car, and occasional documentation composition and viewing. So the quick boot AVS player and the stereo speakers are big pluses for me in the Q1. I already have a few high capacity CF cards so the CF slot of the Q1 is also a plus.
I do not see anything that the TabletKiosk has that would make me prefer it over the Samsung except for maybe the eraser mouse. And the pending Asus unit seems to be even less desirable to me.
Price is about the same now for the Samsung and TabletKiosk units when configured the same.
If I had a Q1 I do not think I would upgrade to a Q1b. But I will need to decide which one to buy initially.
Helmut