I'm glad you're reporting them to yahoo - we did the same thing when they approached us a few months back. I think yahoo shut down that particular account. Doesn't stop them opening another one, but I like to imagine that it really annoys them to have lost all the e-mail correspondence in the closed account - and it pleases me to think of all the people who have a lucky escape as a consequence :-)

Unfortunately there must be people out there who don't realise until it's too late that this is a scam, which means that the scammers are making enough money off this to continue. But if we all report them as much as possible, eventually it will not be worth their while, especially if more and more people find this site and are aware that it's just a horrid scam.