They /could/ do it quite easily. I can email people who have different kinds of email account with no problem. The Jabber / XMPP protocol was designed to link m

They /could/ do it quite easily. I can email people who have different kinds of email account with no problem. The Jabber / XMPP protocol was designed to link messaging systems in this way. While it would be great if they moved to a pure Jabber federation model or similar, I very much doubt they will do that, however, unless someone like the EU can get their act together and force them to do it.