... and what is this RALLY thing, anyways?

RALLY is an architecture and a set of specs form Microsoft that describes how to create devices that will easily configure themselves into a Microsoft centric network, with a heavy focus on home networking at this time. Here is their overview site:

http://www.microsoft.com/whdc/rally/default.mspx

A couple of important technologies include:

• PnP-X Plug and Play Extensions - This will allow external devices on the network to link themselves into the Windows OS and appear to the OS as Windows devices.
  
• LLTD Link Layer Topology Discovery - the name says it all ...
• Web Services Profile for Devices - I sense a candidate for another round of OSP.. or maybe not?