There were a few "waiting for Surface Pro" responses. I'm not sure I think the price tradeoff is that compelling. $899 + $150 or so if there even is a 4g version + $130 for the Type Cover which most reviewers appear to think is essential equipment. For that I can buy a MacBook Air and get double the battery life and half the hassles.
I'm assuming you know that already that the Surface that's available is the RT flavor meaning that it doesn't run traditional desktop programs, only apps. If you want to get office stuff on there I'm assuming that you have to do Office 365 or something like that. I doubt that outlook will work without a subscription to Office 365 although you should be able to get your mail on the tablet from some sort of app.
I am waiting for the Surface Pro because while the battery life sounds like it will be crappy, I like the form factor better than anything out there. I don't want a keyboard "dock"...if I wanted that, I'd get a laptop. I like the integrated kickstand, pen input and really thin keyboard that doubles as a cover.
for ARM. Surface Pro will NOT come with Office bundled, but as full x86_64 PC inside it will obviously be able to run whatever copy you have around.