TE is Team Estrogen. It's an online store of women's biking and triathlon gear (and some other stuff) and Team Estrogen owns/runs/sponsors this forum.

So, when someone says "TE" they can mean either this forum, or www.teamestrogen.com

(if you click the "click to shop" in purple under the biker at the top of your screen, it will take you directly to the shopping.)