I bought the Freedom Pro Bluetooth Keyboard for the Xoom and it works really well.It was simple to install; put in batteries, switch on, press pair button, search on Xoom, finds keyboard - pair, type in pair key on keyboard, and it was paired.
Now to connect I just press home, at the homescreen, I turn on the keyboard and it automatically connects and the keyboard can be used straight away.
The escape button works as back and the Fn + internet button works as home. The Fn + volume buttons also work.
The little easel thing that you can stand your phone on doesn't work with the Xoom though. The Xoom is just too heavy.
I love that you can have a full keyboard, but can fold it in half so that it can be more portable.
It also seems to come in different layouts for different regions.