I have just started a contest on my site encouraging users to subscribe to our RSS feed. In doing so they have a chance to win a free iPod. So far the after the first day I have gained 40 subscribers so I am hoping the momentum keeps going.
Plus you can get them engraved with your sites address as well. So when the person who won the iPod gets asked how he/she got it they can show off the engraving.
Ah ha! Brilliant - I didn't know that. Okay, sounds like you really have all your bases covered in this promotion. What is the signup count up to now from the promotion?