I've released IMAP-IDLE 1.06. It's really an interim to the next version, to get bugfixes out to people using it. It has a Preference pane, but it doesn't do anything yet.

You can get it here:
http://www.rothwell.us/imap-idle


Changes:

1. Bugfixes!
2. New icon!
3. Nascent preference pane!

Enjoy!