How can I create a button for Windows Live Messenger for a website?

I would like to create a button for my blog so that when its clicked, it opens/adds my Windows Live Messenger ID to the persons own WLM, as a new contact. Or a command that when clicked opens a conversation with me in WLM.
Any idea how to?
I would also like something like this for Skype (I already found the button to talk to me on Skype, on the Skype website, but not one to add me as a contact). But WLM is more important.
Hope I was clear… if not just tell me and I’ll try to explain better what I’m looking for.

Any opinions or ideas would be great! Thanks!