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I feel your pain, and I would hate to loose the account I have been using for well over five years. To this day, I only get three to four junk mailings a month through this account.
When using things over the net for account creation, do what I did and go to hotmail and create a spam account just for logging into and registering at sites that require it. I have no less then five main email accounts that I have been using for quite sometime, and none of them recieve spam because I don't use them for anything other then personal mail. My hotmail is the ultimate catch-all spam account that I don't even have to check, except for registration confirmation that I can later ignore or delete at will. I don't even look at the rest and I tell people on my MSN not to send mail to that account if they want me to read it.
Anyway, just felt like sharing since I know what it's like to have a long standing email account.