The Web Development Group must be having quite a party today. They just shipped ASP.NET MVC 3, IIS Express, Orchard, SQL CE 4, Web Farm Framework, Web Deploy v2 and WebMatrix. Yikes! and they are all free.
Get it all via the Web Platform Installer v3
BTW I checked out the Web Farm Framework at a presentation recently. It is one of those things that don’t get much attention, and most devs and IT Pros don’t know about it – but it is fantastic!