I found some maternity workout shorts that really didn't look any different than regular shorts, but they were much more generous around the tummy without having huge legs. I also got some sweatpants much larger than what I normally wear.

Edit to add - I got the shorts at Motherhood Maternity.

I bought some men's long T Shirts and some full panel workout pants. I didn't really need them until I got halfway through my second trimster though. They are more comfortable and they don't constrict as much on my bladder, which is a plus.

I bought two maternity tankinis to swim in (@ Motherhood Maternity). I also bought maternity tank tops and a couple of pairs of maternity yoga pants. I wanted everything to be relatively form-fitting, so that when I'm doing yoga (and go into some pose, like downward dog), my shirt stays put and the belly is covered. I also bought some regular yoga pants (at H&M) one size larger than my normal and those are working great.

I just wear my normal workout pants below my belly and wear a shirt that's oversized so it's long enough to cover my belly!

Yep- This is what I do as well!

Ironic - I'd just been looking at these on zulily:

http://www.zulily.com/e/for-two-fitness-112612.html?pos=13&tab=baby-maternity

They aren't cheap - but they are adorable!! Since I just work out at home, not really a necessity. But if I went to classes at the gym... this would be on my Christmas wishlist.

Totally adorable! However, $30-some-odd bucks is generally not what I like to spend on something I'm going to make smelly

Agreed, sadly.