Leopard's mail will support IDLE... yay!

Version 1.07-pre-3 of my IMAP-IDLE plugin for Tiger's Mail.app is the most recent version. It was released on May 15, 2007.

I'll see if I can get another release out soon. Maybe even 1.07-final. The big issue with the 1.07 series is that I switched from using threading to using an event-driven state machine that utilizes Mail.app's runloop to process networking events. While it's lighter-weight, more deterministic and easier to control (and debug), it appears that there's still some bugs (see the comments here).