Thanks to all of you folks for your inputs. I tried the pedaling-while-standing maneuver today and it worked! It wasn't smooth or pretty. Far from it. It was a rather jarring movement, besides I can only do it for like 10-15 seconds since my quads were burning. However, it worked, and I managed to finish the one hour trainer ride without my painful butt stopping me. I must confess, though, that time just doesn't pass easily on the trainer, but I am committed to riding everyday (with one day a week rest) so I won't let the simple boredom stop me.
Now my next question is how do you folks build the stamina to go for longer distance/times? I find that I am pushing myself hard to finish the one hour ride, with an average speed of 10 mph, whether on the trainer or on the road. How long should I expect before I can ride for say 20 or 30 miles straight? Hopefully I can get there in 2013! Cheers.