I'm pretty sure that driver is in the repo's now. If you didn't install ndiswrapper then skip steps 2,3,4.
Update and upgrade using update-manager/synaptic/adept etc
Remove the Line from /etc/modules. Then disable Wireless from the network manager applet and then:
sudo apt-get remove ndisgtk ndiswrapper-common ndiswrapper-utils-1.9
If it says something about module being in use, it means you have not disabled your Wireless so, so restart if there were any kernel upgrades. Then after do the following System->Administration->Hardware Drivers You should see a wl driver there, it should say "In use" if it doesn't click "Install driver" and you should be on your way.
sudo modprobe -r ndiswrapper