Yep. A heck of alot of people.
http://www.crimes-of-persuasion.com/Crimes/Business/nigerian.htm
Yes, there are. My husband had a co-worker who was "negotiating" with one of these scammers. Everyone was telling him that it was a scam, and to drop it, but he kept insisting it wasn't. The scammers wanted him to fly to Amsterdam to meet them. Eventually, he saw the light and backed out. Also, one of the local TV news channels is doing an "expose" on the Nigerian scams tonight. Their promos state that "Bay Area families have lost millions".