1. wlan: you used the wrong instructions. you need firmware from /your/ phone(2 files, one of them, the calibration, is in essence a lock ). if the mac changes(it normally fetches it from nand, but if it can't access the nand it gets a random mac - another lock mechanism), it needs need the mac adjusted( e.g. via "ifconfig HWADDRESS " or in /etc/interfaces ). if the if name changes you need to fixiate it(e.g. via udev rule). further you can localize it via module parameter to meet regional requirements - don't know if it is necessary as in my case it works without that. but if not you might want to set this to your countrycode to meet regional requirements....
after that can you configure it like any wifi device.

for details look at the n900 debian page. wlan setup is the same in ubuntu and debian. it has a complete description.

2. this is the last time i repeat this(you will find it in the threat at least a thousand times).

- keyboard was never an issue. just load the driver and set x up. it works "out of the box" - only thing you need is to tell the phone about the layout to get the blue keys working(x config).
- touchscreen needs the tsc2005 driver compiled for the kernel you use. if you have that: works also "out of the box"

yes, it works.