Terry makes a maternity short:

http://www.teamestrogen.com/products.asp?pID=14019

And it sure looks like it will go into the third trimester!

Your OB will probably be thrilled that you want to keep exercising; mine was. I found it helped with the exhaustion and morning sickness, once the motivation kicked in to get on the bike. My OB may have recommended to keep my heart rate down -- it's a bit of a haze.

In the third trimester I was walking after lunch for 20 minutes. One day I rushed to get to the bathroom, and set off some practice contractions (Braxton-Hicks). Oooo, that got the adrenaline pumping! But slowing down the walking stopped the contractions, and I still got to the bathroom on time. This information was useful when I went into labor at 4 a.m., labor stopped by 11 a.m., and a nice long walk had me in the hospital by 8 p.m.

While we're on the subject of bikes and tykes: we have a back-of-the-bike seat for the little one (shower gift from my sister -- she's so cool). He's too young now (six months), but WILL be riding with us next spring. Should we also consider a trailer? How about the "half-bikes" that attach to the back of a parent's bike when he's older? Or his own bike and a bar that will attach his bike to one of ours?

Good luck!

--SJ