I just installed Windows 7 (32 bit) on a Medion MD96500 (Intel 2200BG Wireless Card) and then installed the Windows Vista (32 bit) driver.
Now, in the "device driver window", the Wireless Card is listed as working/active.
If I want to set up a wireless connection, however, I always get the error message
No connections available
Pushing the hardware-switch (or however that thing is called, right next to the keyboard) does not seem to have any effect.