There are a number of ways to boost traffic to your blog, such as traffic exchange systems (Blog Soldiers, Blog Explosion, et al) and link exchanges. A new link exchange, Ex-Link, is about to start up and they are using a viral mechanism to promote it. The site itself gives little away, other than an invite to sign up. When you sign up, you get a somewhat cryptic message thanking you for signing up. It'll be interesting to see if this succeeds.