I have heard that the release version of Indigo will be wire-level
compatible with the "last" release of WSE (whenever that is). I tried
to write a simple app that used wse2 to send a message to an indigo
app (using RTM version of WSE2 and the PDC release of Indigo, and  tcp
as a transport). It didn't work, but I did not spend a great deal of
time trying.

JosephCooney

The purpose of WSE 2.0 (and future releases) is to smooth the migration to
Indigo. Microsoft publishes guidelines on what you can do today to be
Indigo-ready tomorrow. For more info, check out:

http://msdn.microsoft.com/longhorn/understanding/pillars/indigo/migratevideo/

Jeffrey Hasan, MCSD
President, Bluestone Partners, Inc.
-----------------------------------------------
Author of: Expert SOA in C# Using WSE 2.0 (APress, 2004)
http://www.bluestonepartners.com/soa.aspx