Just launched our biggest promo ever, now what?

Note: I am not going to post the promo link here. This post is to learn how to promote it, not promote the promo.

So we just teamed up with a great company to do a collaborative promotion. The site gets a few thousand hit per month right now, but we are expecting a few thousand a day over the next 30 days.

Our target market is small biz and startups. We have ramped up our servers (rackspace) and made necessary changes to the home page.

We are posting on Facebook and Twitter and the whole CL thing, but we want more visitors/participants.

Without going into detail, our deal is a free service worth about $1200, just by signing up with an email.

Any clever and creative ideas for marketing?