5 Administrivia
40 Requirements Discussion (General) - Brian Rosen
   Discussion to cover:
    - scale (number of recipients, geographical distribution)
    - the idea of implicit subscriptions as well as explicit
    - alert filtering (identifying what alerts are of interest...subscription)
40 Requirements Discussion (Security) - Hannes Tschofenig
   Discussion to cover:
    - authentication (end-to-end and hop-by-hop)
    - authorization (what parties make what decisions)