I agree with Nelie. I went vegan at the end of last April largely due to ethical reasons. I've lost some weight with it but there are plenty of vegan foods that are high calorie - pasta, french fries, pizza (no cheese of course), etc. It's still all about balance - eat healthy foods and burn more calories then you eat.
As far as tempted by not vegan food - no way. After educating myself about the animal industries - it's the last thing I'd ever put into my mouth, use to clean myself or house, or wear. It's pretty repulsive to me now to be honest.