This is what Pingback should have been, not crappy XMLRPC nonsense: http://activitypingback.org/
@sandeepshetty fab :) I want to get Salmon working so I can reply/fave/etc. from my own software but it’s bloody awkward. Currently in the process of publishing some ideas on how magic sigs could be more effectively used. In the mean time, Pingback FTW!