I didn't go vegan as a weight loss thing, but I did lose some weight originally. Then again, there weren't many vegan products a long time ago so I was eating pretty healthy. Now there's vegan pizza and ice cream everywhere and I've gained much of the weight back. Anyway, I went vegan for ethical reasons/animals.
If you're looking for weight loss tips you might try the Spa's thread: viewtopic.php?f=25&t=7591