There is no mention whatsoever of the new support for WPA2 in the version info/release notes for the latest mini pci driver for most newer IBM Thinkpads. But, it’s in there. Definitely and positively.
http://www-3.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-52527
has a download for driver 4.0.100.140a which enables WPA2 support for
- IBM 11abg Wireless LAN Mini PCI Adapter
- IBM 11abg Wireless LAN Mini PCI Adapter II
- IBM Dual-Band Wi-Fi Wireless Mini-PCI Adapter ( 11ab )
- IBM 11bg Wireless LAN Mini PCI adapter
for the following Thinkpad systems:
- ThinkPad G40, G41
- ThinkPad R40
- ThinkPad R50, R50p, R51, R52
- ThinkPad T40, T40p, T41, T41p, T42, T42p, T43, T43p
- ThinkPad X31, X32, X40, X41–