That's really awesome Tirith, congrats.
I've been losing a bit of weight myself. I'm down 18.5 lbs since the start of January, from 158 to 139.5 lbs. I haven't weighed this less in about 4 years. I still want to lose about 30 pounds or so, but we'll see how things go. I'm not super committed to that number, it's just that when I was in high school and weighed the least amount (115) I still had a belly on me and I'd like to see if I can get to a point where I don't have a belly. I figure if Jillian Michaels can do it, so can I. She was fat when she was a teen, for people who didn't know.
Mostly I've just been counting calories, using the website loseit.com, which I found via the Chrome app store. They've got an app for android phones too, which is nice for when you're on the go. I've also been exercising a couple times a week, though I'm working on trying to increase that amount. I do some yoga, some dancing with the Just Dance Kinect game, and some weight lifting/circuit training. I'm sure my meds for ADHD probably have helped some, but I do think my diet changes and exercise are most of it.
Anyone have any invites to Fitocracy? It sounds like a neat idea but they're still closed to the public.