Yesterday night I had a dream about how it would be cool to highlight special kinds of comments, like TODOs and BUGs.
But when I came to office, it turned out that JetBrains stole this idea a few days before.
Their solution is extensible and customizable, but all those customizations don’t work at the moment.
Mine, at the moment, has three hardcoded colors and regexes, and it IS working properly.
Check it out:

This is done as a part of Nemerle->VS2005 integration project. Here is the link for russian readers.