The only time I get spam at my Gmail account is for a week or so after I send an invite to someone who's hit me up for one, and that person proceeds to practice unsafe netsurfing. But I think maybe three of all those spam messages actually found their way into my inbox--most got routed to the spam folder right off.
I haven't had a single piece of spam in a few months, though, in my inbox or my spam folder. It reminds me of when I first got an e-mail account, before spam was as omnipresent as it is today.