I would like to see a "View this note with HTML" option. That could produce a lightbox or popup or new window or whatever, I'm not picky. (This could avoid some of the security issues, right?)

I use Gmail filters to dispatch some lower-priority emails I receive over to RTM and it would be nice to be able to view the emails as the sender intended without having to go back to Gmail to find them.

This would be similar to how Facebook does it - first you get the text-only version, you have to make a second click to see the HTML version.