Aimed at enterprise and small business users, NightHawk supports Mac OS X 10.5 Leopard and Windows Vista, but will also still support Mac OS 10.3.9-10.4 and Windows XP and NT/2000. Migration from NUDC will be a breeze, and you'll be able to import from most other common formats, like vCard and iCal and sync with a variety of PDAs, cell phones and, of course, an iPod.
Taking a cue from Apple's iTV-AppleTV launch, the official name has yet to be determined and will, according to a Now rep, be announced at a later date - presumably before the retail boxes are printed. It's expected to ship in the spring of 2007. As I've come to expect from Now, the Mac GUI of NightHawk is a few years behind the times, but it is an improvement over NUDC and it has tabs - so how bad can it be? That icon, however, has got to go.
The NightHawk calendar & contact module will cost $149.95 per seat and owners of NUDC v5.x and later can upgrade for $69.95 per seat. For a limited time, current NUDC v5.X owners may also purchase a one-year maintenance agreement (that's usually a codename for "pay-for-tech-support") for $39.95 per license, which will give you free upgrades to new versions of Now and NightHawk for one year from the start of the maintenance agreement.
I use NUDC personally, and have always been a fan, despite the GUI flaws. It's one of the few holdovers from my days of using Claris Emailer for mail. I wonder how many of you long-time Mac users are also still using NUDC at home or work?