Promote your site through wireless networks
 

Here's a tip if you want to get some nerdie exposure: name your wireless network with your domain name.
Each time someone in your vicinity will check the available wireless networks, he will see it and may even try it if he's curious enough.
Of course, it will work better if you live in a crowded city and your domain name is network related.

I've noticed some pretty funny ones out there sometimes when driving around.