I'm told this is a very competative position @ the moment as Laparoscopic fellowships are still in their infantcy with more people interested in advanced training then there are programs up & running yet. Right now bariatrics is pretty lucrative, but you couldn't pay me enough to deal with a large practice of post-operative bypasses & bands. They will drive you nuts!
My impression re. bariatric surgery is that this renaissance will be short lived b/c:
1. The malpractice costs are threatening to kill the viability of the field for most non 100% practice-based bariatric surgeons
2. I'm waiting for the other shoe to drop with delayed problems from the gastric band desighns in re. to erosions
3. The operation is one pill away from being obsolete
Keep in mind though, people have been making these contra arguments for 25 years & its more popular then ever