I just a moment ago managed to bump into this abstract by Flickr and Twitter folks. The description and the slides were very interesting in context of Xernel as it describes—with a somewhat fine accuracy—the case we’re pursuing. We’re tackling the human interaction and a more general systems integration parts of the whole, but the landscape is exactly the same. We’re also sporting a bit broader view on the integration than just the bot-aspect.
Twitter clearly seems to have greater plans for XMPP applications.