[Plugin: Digg Digg] Any plan for XFBML support for Facebook Like Button?

Is there any benefits over the ancient method?

Yes.

1) With XFBML support you can avoid using FB share button. FB like will work as 2-in-1.
2) You can track clicks and share: https://www.facebook.com/insights/

Thanks for the information, will do study on it ??