A great resource, not only for checking out the scams, but also for checking out the "be on the lookout" warnings that get mass mailed to everyone and their dog by well meaning friends is snopes.com. It's also great to check out those "It happened to a friend of a friend... really!" stories.
You're right about snopes.com. I've checked for things on there before, but I never seem to remember it when I see warnings about scams.
My son-in-law got a 4 page chain letter in the mail last week giving him the 'opportunity' to make up to $800,000 in a couple weeks.
A day later, I got one with a scratch-off lottery ticket in it. I'm suppose to send out two lottery tickets. An odd one I got several years ago said I had to buy X# of dish towels and send them to all the names on the list
. I thought it was a joke, but it wasn't.