Veggie Dave's Extreme Racing Site has done a good Supermotard FAQ page, available here. The rest of the site is pretty good too!
Check it out at Veggie Daves Extreme Racing
Topics covered by this FAQ are:
General:
What Is A Supermotard?
Is It Supermotard or Supermoto?
Do 'Motards Require More Maintenance than Multi-cylinder Bikes?
What Bike Should I Buy/Build?
Are There Any Supermoto Mailing Lists?
How Do I Stop My Husqvarna SM610S 'Surging'?
My CCM 604/640e Has A Handling Problem...
What's The Cheapest Way To Tune My 'Motard?
How Do I Register My Converted 'Crosser For Road Use?
What Road Tyres Suit 'Motards?
Racing:
Will A Standard Factory 'Motard Be Competitive?
Riding Techniques
I Want To Go Racing - Who Do I Contact?
What Tyres Should I Fit For Racing?
What Tyre Pressures Should I Use?
Which Engine Tuners Specialise In 'Motards?
Knee Down Or Foot Out - Just What Is The Best Way To Corner?
Are There Any Regulations Regarding The Construction Of A Racing
'Motard?
How Do I Cut My Slick Tyres?
What Do I Need To Take To A Race?
There's also a subsection FAQ page aimed at those new to mailing lists and newsgroups which can be found at: