Rated 5 out of 5 stars
This extension is indispensable. I have it running on TBird 2 using the instructions from an earlier comment. The problem is that it breaks the header pane. I thought about making it 4 stars because of this, but the author never claimed it works on TBird 2, so that would be unfair. The conundrum is that I can't decide which is more important: The notes or the header pane. I think I'm going to go with the notes for now because they're so darn useful, but I REALLY hope this gets updated soon for TBird 2 so I can have my header pane back! Awesome extension.
I'll more than happy to donate dollars to get it fixed for TB2!!!