Its not too much of a worry but like others say it will eventually get picked up and used in SPAM lists. Best course of action is to get yourself a nice new Gmail account (big gmail fan here LOL) and start moving over to it now. Always keep the two accounts and sign up for any forums and none important stuff with the old address. That way all the junk adverts and mailing lists you invariably get added to will not clog up and dilute your important new email account. Sadly its probably to late for your old email address.