At the network layer, of course. What did you have in mind? - ferg -- Scott W Brim wrote: On 05/20/2006 15:16 PM, Fergie allegedly wrote: > This is, I think, a fascinating concept worth persuing. at what layer? Do "service discovery" and web services "ws-eventing" give you what you want? -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg@netzero.net or fergdawg@sbcglobal.net ferg's tech blog: http://fergdawg.blogspot.com