For the love of godiva, post your email address!
This is important so agents can contact you, but also, it's important if you're entering a contest - like the gal I still haven't heard from who won Karin Tabke's book. There has to be some way to contact you privately listed on your blog, your twitter bio, your FB page... Throw the world a bone.
And I realize putting your email addy out there means who might get inundated with spam or let stalkers know where you can be reached or any number of other paranoid things. I get it. If you're worried, create an email addy that you only use for public consumption. But please... Be reachable. You never know when you might be missing out.