Update 11-3-08: Updated to provide additional user variables: Set "splitOnLoad" to remove hover animation and permanently split the links on pageload. Set "boldRoot" to add emphasis to the root domain of the green url. Fixed other minor bugs.
Update 10-24-08: Updated to work with new google tags. Not fully verified, but seems to be working.
Update 7-23-08: Updated to work with FF3 and some new google antics.
Update 4-15-08b: Changed link color from blue to green, added this as a user variable. Use "default" to revert to native style (helpful if using a custom style).
Update 4-15-08a: Cleaned up the code a bit with comments, added user variables section at top.
Update 4-14-08: Added a small margin animation and fixed some bugs. Verified operation on Firefox v3b5

When you perform a search and get some good domains in the results, but you don't want to go to the exact results page, just mouse over the green url below the link and you can select any of the sub-domains in the url. Inspired by the firefox "locationbar2" extension.

Screens:

Enjoy.