It is really easy to configure wireless lan card in your lenovo s10. Its default driver won’t work properly in Linux. So do the following command.
# apt-get –reinstall install bcmwl-kernel-source
Now go to System -> Administration -> Hardware driver , here you can see Brodcom STA wireless driver. Reboot your laptop and connect to wireless.
Some usefull urls,
http://www.broadcom.com/support/802.11/linux_sta.php
http://www.s10lenovo.com/viewtopic.php?f=13&t=551
