Y'all are a bad, bad influence.
I read through this thread yesterday, and "randomly" stopped by my friendly neighborhood Salvation Army yesterday. ("Randomly" as in "I got on my bike with a backpack and rode over there...")
For $10.80, I got an athletic top (the tank style, with a built-in bra, which was the only thing I really needed), a pretty skirt WITH POCKETS! (OMG, I am so freakin' tickled with this! And it's got tons of cool embroidery and detail that I would never sew into a skirt I make!) and a somewhat-dressy sleeveless top.
The third top, though it sounds the least exciting, went under the sewing machine this morning and now fits me without my bra showing. (I took up the shoulder seams about 3/4 inch on both sides.) It's got a cool pattern, and looks adult-y and is some synthetic silky material that doesn't touch me in very many places -- perfect for the hot part of summer. I am wearing it now, with some shorts I collected for $5 or so a few months back...
Now to remove the stinky-est tank top from my dresser...
(I swear, I soak them in enzyme solution every couple of months, and they still get incurably stinky. Any suggestions?)