Fascinating stuff. Unfortunately this isn't working on this Windows 7 RC1 machine, even with compatibility mode set to XP. The java app will run but in a blank screen. I edited the texture size in app.properties as suggested by the project's wiki but without look.

Running it from the command line I alt-tabbed out and saw that it had "got it" all over, as soon as I performed any action on the n900 onedotzero app, which means it's communicating alright. Indeed, upon alt-tabbing back into the program, I could see for a split second the text I had written on the screen.

I'm guessing it's a display issue with the java app.