Ultimate Guitar is a plugin for amaroK that allows users to search for guitar tabs on ultimate-guitar.com.
As far as requirements go, you'll need to have amaroK installed along with Python. But assuming you've got those covered, using Ultimate Guitar is a breeze.
One recent update worth noting is a fix for a small bug that conflicted with space characters. This was addressed by Cerion Armour-Brown in the most recent release. Overall, though, the script is fairly straightforward and does what it sets out to do with relative ease.
Version 0.0.3: N/A