Then this summer I got the ThinkPad X100e and installed Windows 7 Pro 64-bit.
Windows 7's networking is pretty different than Windows XP networking so I had to work some to get the tethering working.
First you have to pair the X100e and the BlackBerry. Remember that you have to make the X100e discoverable first.
Then click on the Start button and type "dial-up." Select "Set up a dial-up connection." Choose the Bluetooth link.
Here's what it looks like when its done.
This string is:
at+cgdcont=1,"IP","wap.cingular"The password is CINGULAR1.
Then go into the "Network and Sharing Center" and choose "Internet Options."
Go to the Connections tab and check "Never dial a connection."
Finally go to "Network Connections" and uncheck "Cancel as default connection."