Subscription to blogs in real time by IM • WordPress Help

The idea is that you subscribe to the posts and comments of your favorite sites, created with WordPress, through your preferred instant messaging client, using the protocol Jabber ( XMPP ]), a free service with which many of today's instant messaging clients are compatible, as long as they are multiprotocol (such as Adium [Mac] or Pidgin [Windows y Linux] or almost any existing iPhone client).

Once you have chosen a client that supports Jabber messages in HTML, like the ones mentioned, you only have to add as a contact to bot@im.wordpress.com and you can subscribe – for now – to any site created in WordPress.com through your address of type misitio.wordpress.com and you will receive in real time, you can even respond to a post through your messaging client.

There are many more features , that pued is to check on the page of WordPress support in Jabber as well as the list of commands to use to subscribe to a blog, unsubscribe, etc.