I should have invested in Gmail (free money method)
 

First I bought a gmail invitation from ebay for $50 and opened an email account.

It still goes for that much or even more.

Since then, gmail gave me 4 invitations that I could send out, just for beta testing their service. I could sell them on ebay for $50 and make 4 times my money back, but i havent done that.

Someone can just buy lots and lots of gmail accounts, and sell the invitations later. I figured you can get some pretty nice ROI if you get several invitations per account just like I did.

Heh, easy money, plus you get to choose cool usernames for getting in early. My email is: programming AT gmail DOT COM

When did you sign up?

I signed up about a month back, I have only got one invite, that I sent to someone who didn't use it and it expired like three days later instead of the three weeks it was supposed to last. :glugglug