Like a recent poster, I also never got my trial key email, apparently due to spam blacklists. When I didn't get that, I registered here with the same Yahoo! email address and didn't get that email either. (I know, I should have thought it through before using the same email.)
So, I registered again with a MSN email address where your confirmation emails aren't blocked. But I still don't have a trial key to use your product and I'm not allowed to use another email address to request a trial key.