This didn't work for me....the folder didn't exist, creating one called 'my documents' didn't result in the contents being available in Kindle
Just FYI, what worked for me is plugging in my xoom, navigating to the kindle folder, dragging my .prc files into that folder then changing the extension of the file from .prc to .mobi. I opened up the kindle app, when to "Downloaded Items" and my books were there. So I guess if you have epub, see if you can find a epub to mobi converter.
TweetComb looks pretty nice. It's what I wanted Tweetdeck on Honeycomb to be. Looks like their delay was your profit.
Big update today. Up to 155 now.
Death worm, Works and look good. Really fun game and rund perfect on xoom.
https://market.android.com/details?id=app-com.playcreek.DeathWorm