Hipchat Relay Plugin
This plugin allows trac to send notification messages to various HipChat (http://www.hipchat.com) rooms. It provides an admin interface to configure what rooms you want to send notifications to, the API key, etc. It currently only sends notifications on new tickets, and changed/modified/deleted tickets. Soon it will notify when attachments are added to a ticket.
As always, USE AT YOUR OWN RISK.
If you have any issues, create a new ticket.
Download the zipped source from here.
The way it currently works is first a custom-field with pipe-separated values is chosen. In the admin panel, you then set chatroom names for each value found in the custom-field. There is a "default channel" option which will be used if the input is left blank. In the admin panel you also enter your API key from hipchat, and the "username" of the announce...like TracBot.
I believe if you do not currently tag your tickets with a custom-field (like projectname), and you just want all tickets to be sent to one chat channel, just fill in the "default channel" option and that will happen. I'll test this eventually.