Hi Bruce,
the following web-site has a forum for just your topic:
http://www.sahara-overland.com/
also, the guy who runs the site has written a book on crossing the Sahara and Africa with motorcycles. You can probably pick up his book at a decent travel bookstore in the UK.
Another worthy resource might be to look at some of the german, swiss and italian web-sites for Sahara travel, see links at my web page:
http://www.stud.ntnu.no/~skjetnep/ta.html
Have a nice ride,
-Paal w w w . p a a l . s k j e t n e . c o m