Are you sure it's a driver issue? Cisco doesn't offer Win7-specific drivers for the WMP110, but this thread indicates a possible solution. You might want to post there to revive the thread and see if the OP can give you some more info.
Cheers,
Walker
Windows Outreach Team
My Computer
Computer Manufacturer/Model Number
HP Pavilion dm3 (netbook) *** 27" iMac (Dual-Boot)
OS
Windows 7 Home Premium (64-bit) *** Windows XP SP3 (32-bit), OSX 10.6