Yep its for real. I think Pokeraddict even mentioned the site you refer to. I propped with them for 2 years before burn out kicked in and they were great to deal with.
Here is one thread. Just do a search for "propping" for others. http://forumserver.twoplustwo.com/showfl...rue#Post9981936
They are legit. You work for the poker rooms helping them get games started. The rooms are usually small rooms that need help with getting players. I know the people at that site and can say I've never heard a bad thing about them.