The Old Spice guy (Isaiah Mustafa) has started responding to Twitter users (as well as users on other Web 2.0 sites) mentioning his recent commercials via the Old Spice YouTube channel. And he doesn’t stop just there, he’s started replying multiple times to the several people on Twitter. “OMG… the old spice guy is stalking me.. ha’!!” wrote Kevin Rose on his Twitter account, linking to Isaiah’s second response. After hours of posting, 30+ hysterical videos were listed in the “Responses playlist” on the YouTube page.

This form of advertising has received great feedback from many Web 2.0 sites and even the LA Times’ blog. It’s also great news for the actor himself as he’s recently signed a talent deal with NBC.