Ssshhhh! I've got a secret to tell. This biking stuff...it isn't so bad. Ssshhh! Don't tell anybody! Especially not Coach. I've been riding now twice a week, with most rides being between 30 minutes and an hour. The soreness is going away. I've been able to increase my RPMs comfortably. And my mileage is coming up. I think the thing I like most about it is it's a nice respite from running. Marathon training has been extreme and I'm ready for a break.
Speaking of break, after the marathon Coach is making me take a mandatory 2-3 week, absolutely no working out, break before Ironman training begins. I think I might die during that time.