initial (ROUGH!) draft of extension fwk doc

http://dev.w3.org/cvsweb/~checkout~/2002/ws/arch/wsa/wd-wsa-ext.html

This is being posted merely to allow members to get an initial glimpse at
what this *might* look like were we to take this idea further... 

Cheers,

Christopher Ferris
Architect, Emerging e-business Industry Architecture
email: chrisfer@us.ibm.com
phone: +1 508 234 3624