Determine whether user is logged in as admin (Whidbey) #.NET

I'm not actually coding in Whidbey yet, so this is mostly a bookmark so I can find it again later.

Brad Abrams posted code a while back showing how to use some of Whidbey's new classes to determine whether the currently-logged-in user is an administrator. Looks like their wrappers for the security stuff might actually make the security APIs usable.