It is my understanding that commercial use of Twain is
currently managed by CMG Worldwide -- the company involved
in the Nevada lawsuit.  A good article online about the
controversy is at:

http://www.tahoe.com/tribune/stories.5.15.00/REGION/1istw15May993.html

The CMG web site is at:

http://www.cmgww.com/

And although their link to the Mark Twain Forum is in need of
updating, the "official" Mark Twain page is at:

http://www.cmgww.com/historic/twain/index.html

Barb