Digging around a bit more, turns out the 10th generation is now available

84 10 6 980 130

From http://www.bimmernav.com ..

"The new 10th generation ULF module started production in August 2006! with significant hardware and software changes for optimizing the hand-free audio quality, speeding up the connectivity between Bluetooth devices and support for additional Bluetooth phones. This ULF module has been widely used in many BMW retrofits although is not available for purchase from US BMW dealers. Purchases only can be made in large quantity international shipments such as BMW Germany.

We have found the 84 10 6 980 130 ULF module to be a significantly better performing ULF module than the previous generations and would recommend this version to anyone considering Bluetooth.

The 10th generation ULF modules, supports a large phonebook capacity of 1,000 names in the address book vrs only 500 names in the previous generation ULF modules. A noticeable difference can be found when pairing new devices or entering the vehicle as the 9th generation ULF pairs to your phone quicker"

You might want to go over to the bimmerboard bluetooth forum. Alot of members there have retrofit the ULF Visteon module and may have come across this. Martin who runs bimmernav is a great source of info, and often replies to questions on that forum

http://www.bimmerboard.com/forums/bluetooth/

Good Luck !