Okay, this is a tricky one. I just finished a project where we used this open-source library to display HTML: http://code.google.com/p/flex-htmlfilter
It handles lists, tables, etc, and is pretty easy to work with. But, I don't think it supports the trademark symbol. It does support some of the others, though.
I'm using it to pull content from a CMS and display in my flash movie. It has worked great, and allows me all the flash styling flexibility I need.
If you need help, email me at [email protected].
Marcus