Actually, now that I'm thinking of it....Kevin, did you see the other thread that someone released which took this hack and added the HTML or plain text option for the users? That is an extremely handy option to add in if you're going to be updating this one. Some of my members really like the HTML format and some of the members that can't receive HTML email like AOL users like the plain text option and can specify it under Edit Options in their user control panels.
Also, I'm not sure how others would be feel about this, but I'd like to see the forums chosen to include defaulted to NO instead of YES. I tend to pull 10-15 threads out of about 8 forums each. I have 20+ forums. Give me more time....I'm sure I'll think of more options. (kidding)