I'm going to come hop on the bandwagon.
Vital stats: 5'6" and currently 203 and size 18/20. Started off in September 07 at 222 and size 20/22 and the simple change of a more active lifestyle and less snacking has resulted in the drop so far. My goal is 155 and a size 12 or smaller, but I don't have a particular date in mind.
I've always been overweight, like most 'big' folks, but never as excessively as I got over the past few years. I worked at a car dealership, which entailed a lot of sitting around and eating really fattening foods and snacking almost non-stop. I gained 40 lbs in 2 1/2 years. I'm now trying to undo that damage, and I'm already seeing huge benefits in what I'm doing. I'm not completely winded after going up a single flight of stairs (takes me 3 flights before I start getting even a little winded now), I've shed 6 lbs of lead in the pool (haven't been doing any OW dives lately, just pool classes), and I just generally have more energy.
My mid-term goal is to be able to bike 20 miles without being worn out. Right now I can do 10 without being completely dead at the end of it, but 12 is pushing it. Eventually I like to ride a century (100 miles) but that's a long time in the future! Next month is a midnight bike ride in Memphis, it's 17 miles on city streets (lots of hills) and I did it last summer but was completely beat at the end. I'd like to do it this year and not feel like my chest is exploding and my legs are falling off at the end.
Let's do a short term goal now. I tend to work in months, as weeks go by too quickly, but I'll try for both.
This week: Make it to 15 miles on the bike path. Also, go riding AT LEAST 3 times this week (with at least one of them being 15 miles). I share these rides with my husband, so I'm going to encourage him to this goal also.
Next week: 15 mile "Ride of Silence" in honor of cyclists killed on roadways, Wednesday night.
Sometime this month (weather dependent): Ride the mountain bike trail at John Bryan state park. 2.5 miles off-road, considered a 'beginner' mountain bike trail. Adding in the intermediate trail makes it 5.5 miles, I'm not sure if that'll stay a 'this month' goal.