Microsoft teases something 'flat' and 'touchy'

Microsoft Hardware was a bit of a late-comer to Twitter, but it sure is making up for lost time -- it's just posted a pair of intriguing tweets teasing as yet unannounced product. The first is simply the phrase "Don't be so touchy...flat is where it's at," while the second is the tiny image you see above. What is it? A trackpad would certainly fit the description, and you can sort of see what could be the side of one if you flip that image around -- although that's still just speculation at the moment. Considering it's coming from the Microsoft Hardware division, however, it seems likely that it's a peripheral of some sort and not something like a tablet PC. Feel free to leave your best guess in the comments below.

Update: As commenter edoles has pointed out, there's also a second image in Microsoft Hardware's Twitpic account, which was actually added six days ago. Check it out after the break, along with a composite of the two images pieced together courtesy of ChrissSk.