Today I found a good tool for Windows Mobile 5.0 and also for my HTC P3300.

...a WLAN Sniffer. A simple software but I have to test it in the next days.
Here are some screenshots:


Test Results:
It's good to detect WLANs but the encryption failed. So this is just for watching for WLANs.

I will search some more tools to 'hack' WLANs.