How about you make available a chat from your blog? It can be a good ideia, creates the possibility of dynamic and direct contact, but, still better, if your chat is the good old Gtalk, you already use on a day-to-day. As you can see, I added the Gtalk balloon on the sidebar, clicking it, you will be take a window where can communicate with myself even if you don’t have a Gmal account. Is important to note that the chat only becomes available if my Gtalk status is “On-line”. Per example: if my status is busy, the balloon notifies you that I can’t answer at the moment.

To add the Gtalk to your blog is very simple, see this site:
http://www.google.com/talk/service/badge/New