you can capture the whole wifi session by first doing an `ifconfig wlan0 up` so that wireshark/dumpcap/tcpdump (depending which you like to use) can find the interface.

connect to your network, and you can then analyze the pcap file on computer (more convenient than on N900 )

https://www.wireshark.org/lists/wire.../msg00080.html has the info you need in order to extract the certificate. i could successfully get my organization's CA cert this way. As mentioned earlier, this solution may possibly not work if the certificates passed down by your network are not properly formatted from Maemo's cert manager point of view.