I've had a little time to play with my exchanged X41T and things have been going very well. I've installed the following software: Norton System Works; Norton GoBack ; M/S Office; PhatWare PenOffice; PDF Annotator; Avant Browser; Tweak UI and some M/S Powertoys.
I've been happy with the performance. The only real complaint I have is with the clicking disk. The screen is great, the battery life is great and it does not get too hot. PenOffice has been great. I haven't enjoyed the TIP thing. I was use to writing anywhere from my Pocket PC and now I have that functionality again. It also lets you create and execute macros (scripts) by writing a word (you define) and the circling it. I've created macros like "mydocs" (opens My Documents), "f" (forward in browser), "b" backwards in browser, "g" (google shortcut in browser). TIP is more accurate and I use that when I have a lot to write.
If you never heard of GoBack I recommend it highly! It let's you rollback your computer to a previous point in time. A bad software install or upgrade becomes a non-issue. It's saved my butt on many occasions. My only note is that it doesn't always play nice with IBM's Restore and Rescue software. This is due to the fact that both like to start prior to Windows. I will probably write more about the few minor issues at a later time.
Speaking about IBM's Thinkvantage Software, I believe it's very under rated when people compare tablets. It's a big value add for the X41T.
That's it for now, more to come... stay tune...