Multi-State Family Networking?

Valley Redneck asks: "The last few members of my extended family just entered the 20th century and went to broadband. Now that we're all on-line with small home LANs in place, we'd like to start sharing stuff via a VPN. The only problem is I'm the only marginally tech savvy one in the bunch, and I'd rather not have to hop a plane to configure everyone's box. Any recommendations for a broadband router that supports VPN to use on the mother-ship network that will play nice with all versions of Windows XP SP 2 (Pro, Home and Media Center) and its VPN client?"