From what I have gathered the devices being sold in Germany and France at least are quad-band GSM/Edge and tri-band 3G, including the needed 1700 AWS band that T-Mobile uses here in the states. I heard from a user on another forum who imported one from Germany that he picked up 3G on T-Mobile.
Expansys lists a 'UK version' and it does *not* list the necessary band in it's specs. Also, a version sporting AT&T compatible 3G passed thru the FCC last week, but it was gathered from accompanying documentation that it is headed for Latin / South America and there obviously was not any sort of release schedule included.
I do not think any info has surfaced on the version going on sale tomorrow in Taiwan, but I would guess it is the same as what is currently out- only way to know is wait and see.