Thank you so much! That post you directed me to fixed the problem. I don't know how I didn't come across the error. I suppose I never thought it was related to the SLI considering it used to work before. I always thought it was related to the XServer.
For everyone else out there this is the method I used to fix it from the other post. Boot your computer and when x fails to start press Ctrl+Alt+F1 to drop to a shell. Login in with your user name and password and type:
sudo nvidia-xconfig -a
Thanks Aaronp. Although you think the driver should automatically detect two cards and run the nvidia-xconfig with the -a flag? Just a thought.