Yea to test it out you will have to check out the source code. There is no compilation involved since the source is 100% javascript and QML files (which are interpreted by the qmlviewer application). Here is a quick run down on how to test for anyone who feels left out:

(on your n900 device, make sure to enable extras-devel)
@Tensuke it is already pretty stable, just missing the post comment feature (which i will be adding in the next day or two) and it is a little slow (something i will also investigate shortly).

@gri I have not yet tested it out on windows, just kubuntu 10.10 and my n900. You would certainly need at the very least Qt 4.7 installed to test it out on any OS. Not sure how QML importing works in windows (since every other OS uses backslashes instead of forward slashes). I may give it a try on windows sometime soon just to see what is up. Also, qmlviewer has a built-in video recording api, and i have figured out how to start recording, i just can't figure out how to keep recording for more than 1 second. Also, your qml app seems way more responsive than mine I wonder if the C++ helps that much.

@RAZOR very unlikely that i will include fb chat, since it is not something that can be easily done via QML (i.e. i would need to write a C++ Qt library to handle the socket connections).