iTIP/iMIP: Lightning replies to iCal.app invitations
Clint Talbert (ctalbert) of SimDesk and I, with some help from one of Dave Humphrey's Seneca students, Eva Or, have been working intensely on improving iTIP/iMIP support in Lightning. In non-acronym speak, this means adding support for accepting and declining calendar event invitations sent to you via email.
Lightning 0.3 added a feature where incoming event invitations would be displayed as such and could be added to your default calendar. This work expands on that feature by sending your response, such as "accept" or "decline", to the person who invited you (the "organizer").
As of this writing, we are correctly recognizing invitations sent to us from Apple's iCal.app, and sending back a reply iCal.app can parse. This is represented in iCal.app by the green checkmark icon shown next to "lilmatt@pixel...". We'll soon be testing it against Outlook.
With any luck, we'll be submitting it for review in the next week or two. The progress can be tracked in bug 334685.