I thought this was great until I realized that all my meeting invitations were being filtered out of my incoming email. ARGH! Not good when your boss invites you to a departmental meeting, and you insist you did not receive the e-invite.
The workaround is to just use plain old IMAP for your Exchange server, and live with extra folders showing up. The invites will then show up in your inbox (even the old ones you never responded to.) If you double click on the attached meeting.ics file, it will prompt you to add it to iCal, and even send a response back to the sender for you.

