I think that sounds like a great idea! I am not losing weight with any one else although I have made a commitment with myself that I will share here and listen to others ---for inspiration, ideas and support.
I weighed 287 lbs in Feb 2004 and over a year or so got down to 260 lbs where I stayed for another couple of years. I yo-yoed 10 lbs but then this summer as another birthday rolled by I decided it was time that I quit "dabbling" at losing weight and really "do it".
I have lost another 15 lbs since September 1st. My goal weight is 125 lbs.
However, I "celebrated" my recent weight of 245 lbs by dressing up really nice and really allowing myself to enjoy this recent weight lose. I reminded myself that I haven't weighed 245 lbs since 1995!!!
My motivation is having monthly goals--like I want to weigh 243 by Nov 1st and then having my pictures taken again (my first photos on my blog) at the "First 25 lbs", "Second 25 lbs" etc.
Good luck-you can do it!