Congrats on reaching onderland! It's a wonderful feeling and you should be proud. I started out 2 lbs heavier than you and I was denied surgery due to my PCP stating I could do it myself - long story short I figured what the hell - I was pissed and wanted to prove to myself that I COULD and I started August 30th 2010 and I AM doing it on my own. I just had my TT 2 weeks ago and I'm doing great - all the hard work is paying off!
My goal weight is a little higher than yours and I will still be considered moderately overweight but due to my height I know I look creepy when I get down past 150 LOL.
I understand the gym thing - how about walks, or getting a gaming system like the Kinect or Wii? I have the Kinect and boy it does give you a work out!
Keeping track of your food is also helpful and that's what I've done since I started last year - Loseit.com is great but there are several very similar sites that do the same thing and most are free. You may be surprised just trying it out for a week.
Good luck in your journey and keep us updated