Don't think Xoom supports pens. You might want to check out the upcoming HTC Flyer Tablet with their very slick Scribe technology - great tablet for students imo
I'd have killed to have such a device when I was stuck furiously trying to take notes and follow the professor in some of my technical classes - half the time my notes were unintelligible as they were often incomplete/vague - the ability to take notes while recording audio (and video) and have it syncronized would have been a godsend and saved a ton of angst/time. That said, won't be released with Honeycomb to start, but hardly a deal killer.