We're not doing our own brand machines (not yet ;-). Are you after any specific ultrabook already on the market? Frankly, we are not keen on any of them and find them quite poorly built for the price. The Macbook Airs are much better.

We're doing the Thinkpads because the keyboards are by far the best and the build very solid. The X1 is the closest to an ultrabook we could offer.

I was going to comment saying about the same thing as you: none of the ultrabooks on the market are quite there, particularly when it comes to build quality. I am a big fan of Thinkpads, however :)

Revorad, I've been looking at the x220t tablet for, wow, a long time. Any experience with these tablets under Ubuntu? Seems like that beastie, with 4G and an SSD, would be pretty nice. Kills me to buy a laptop that ships with Windows, though 1783 OTD seems not too crazy considering I'll probably be sinking a lot of time into tweaking Ubuntu anyway (or maybe suse -- one of the early tablet linux guys worked for Novell)

x201t here, precursor to x220t, running 11.04. Best system ever. Beats the MBP I used before that, and another Windows tablet before that.

tell me more...

You probably want to wait for Ivy Bridge ultrabooks anyway.