This script performs a search for guitar tabs on the Ultimate Guitar site for the currently playing or selected track. Visit the author's website.
Based on the now-outdated OLGA Tabulature Search script (OLGA is defunct) written by Michael Clabough.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using AppleScript Editor, which is located in your /Applications/Utilities/ folder. More information is here.)