It's going to be a tough call for me for sure. I was intending on getting a WP7 Nokia, use the N900 with my work SIM and divert calls to the WP7, so that i have all the benefits of the N900 and a primary phone on top. This confuses the issue no end... i don't really want another unsupported OS but i do want it too. Have to see how good it is hardware wise and what Nokia have to say about supporting it and what people think of it.

ETA: looks like Elop was full of crap when he said MeeGo wasn't far enough along - odds are this will be out before WP7 devices. I know it's not actual MeeGo, but damn, it is a high end OS that presumably can be upgraded to full MeeGo when the time is right