ok - now that I am comfortable on the SS and have a few rides under the ole belt here are some more observations:
It is a lot more work physically = I burn more calories per hour = I am losing weight even faster
I am even more a freind of momentum than I ever thought possible = once you get those tires rolling, you don't want to stop.
It is teaching me to be a much better climber...now I attack climbs rather than just let the climbs come to me and hope to poke it in the right gear.
I am seated much less than on a FS geared bike - I have become more attached to the bike and ride in the bike rather than on it per say - that might have more to do with it being a 29er than the whole SS thing though
a SS is a great training tool and I can already see after a few short rides, major improvement in my bicycling skill level. If you train on a SS then take the skills you learn and strength you gained over to a geared bike for races, I think it would be a good combo.
bottom line - I am very pleased with how this venture is going so far.