I bought my Toshiba L40-157 at Trony on the 8th of November, 2007. Windows Vista gave me a BlueScreen in less than 30 minutes.
I installed Ubuntu Gutsy.
RTL8187B
This is weird. The hardware seems very flaky. It's internal, but uses the USB bus. Even in Windows it doesn't work for me. It seems as if the device is constantly connecting and disconnecting itself. Most of the time lsusb cannot find it.