AirSet did a relaunch recently:
In my continuing quest for calendar-sharing nirvana, I visited AirSet and recorded CalendarSwamp podcast #8 (1:10:38, 66MB).
AirSet does more than share calendars now, branching out to share Web pages and documents. There's also a cool Firefox plug-in, the AirSet Connector, that lets AirSet users do the kind of smart cut-and-paste to a calendar that Microsoft demoed, but never delivered in a product.
More about smart cut-and-paste calendar options in my next podcast.