what you can do is build intelligence into your client-side proxies, so that
they walk through a list of web service URLs (maybe read in from app.config)
and use the first one that works.   They retry after a backoff interval,
etc.

most people just run wsdl.exe and generate a client-side proxy and they're
done.  There's nothing wrong with modifying the generated code to do
something more intelligent.  That's what I'm suggesting here.

I don't know of anything automated for this, but it shouldn't be too hard to
write it.

-D