Awesome work! A lot of people have written about the need for something like this (including me http://bit.ly/nngbKc). Hopefully GOOG is listening. Kudos, and thanks for releasing it.
Note: I wrote gpMin.
Edit: I hope that didn't come across as condescending or short. I just wanted to let you know there are a number of good extensions already out there that will do what you're looking for and provide extra benefits.