I have read that all the Force Feedback 2 have to be repacked, because the driver in the box produced nothing else than crashes. The repacking is believed to take a few weeks. Thats why you don't find it in the M-store.
The ones in the stores are sold, bigger B&M should have the driver closeby on a an external CD, or you have to download a beta driver. The final release will be on Oct. 17.
If your German is good you can read that at
c't
PS: The crash-problem is specific to boards with VIA-Southbridge. Update only for 9x and ME. Win2000 will still crash :Q