Ok not to ruin anyone's fun, but in regards to wpa bruteforcing with the N900, it's just not feasible.

A word list big enough to 100% GUARANTEE to crack an 8-digit alphanumeric case-sensitive wpa key would have up to 62771017353866807638357894232076664161023554444640 34512896 different combinations. And this is WITHOUT symbols.

On the same basis, a 64-digit wpa key would have up to 39402006196394479212279040100143613805079739270465 44666794829340424572177149721061141426625488491564 0806627990306816 different combinations.

These wordlists would be thousands of terabytes in their totality.

In short, it's possible but not feasible. Bearing in mind that a device like the N900 could probably only check around 20-30 keys per second. The best you could do is capture the handshake with the N900 then use a desktop to attempt to crack the password.

Realistically, the only way you are going to bruteforce a wpa key is if the person who the network belongs to (obviously you ) has set something really mundane or stupid as their key. Any default key containing letters and numbers would be near enough impossible and take possibly years to break.

/rant