This is the best package that MS offers. I'm currently rolling out a client on it now and it has eased a lot of the setup. Last night I created 5 users with email accounts, setup the domain, Exchange, an ftp site, a web site (no coding yet) and an intranet all within an hour. I'm even thinking of setting one up at home for myself!
Interesting code name. Especially since it is very similar to a product from Microsoft called "Orca" which is an editor for Windows Installer files. Why the coincidence?