So I've cooked up a nice tooltip for the trayicon for Pygmy (in SVN r79), with the help of Gian Mario Tagliaretti. Basically, it's a window that looks like a tooltip, smells and tastes like a tooltip, even behaves like a tooltip, but is not one. Here's a peek at what they look like right now (tooltip is on the upper-right):
I guess it could look a little more like a tooltip, but it's getting there. :)
Edit: r86 has corrected the look and improved the positioning. Thumbnail updated above.