Just released to the downloads. Please use the .torrent links. This saves us bandwidth.
We've also put out the first beta of the Network Release. You can download a trial here.
At this time there is NO UPGRADE from M1 -> M2. You must uninstall and lose any data. We are working on an upgrade script. We plan to have this late next week.
Tons of bug fixes and some new stuff, here's some highlights:
Multiple calendars per user
Sharing (Publish & subscribe/Intranet & Internet)
Time zones & recurrences
Attachments & HTML authoring
Spell check, address completion, & printing
“Rubber banding”, drag & drop & mouse-over
iCalendar support (RFCs 2445-7)
Quick-add to Calendar
RSS & Atom Feed Folders
Distribution list management