using subrequest to different server

[Marc Lambrichs]

I'm trying to change a subrequest to do a request to a different server 
than the originating one. I'm not sure if this is possible. Anyway, I've 
skipped the internal_redirect because - am I correct? - this is bound to 
the originating server.

My second thought was using lookup_uri(), but I'm not sure this can be done.
Ofcourse, I'm trying to avoid a normal redirect either through apache 
config, or mod_rewrite or defining a separate handler. Any ideas?

Cheers,
Marc