I've heard of other people/sites doing this and I thought I'd try it out. Here's my Tumblr "Ask" page: http://silvanon.tumblr.com/ask (http://silvanon.tumblr.com/ask)
As I understand it, it lets you send me a message, which I can then choose to respond to. It has an option to send anonymously, which some people might like to do. Um, ... I think that's all. Ok, here's trying it out!