Hey Nolan,
Great workflow! I use iMessages as work chat client, so your workflow is one of the most used ones.
One problem I have is that I cannot send messages to the users whose contact card has only jabber username. Such contacts are not found by your workflow. And if I add a phone number for such contacts, the workflow sends imessage directly (which, of course, is not delivered).
Is it possible somehow to send a message to the jabber contact (which is visible in iMessages app)?