Re:Tux as a remote server caching device?

I have looked into doing the same thing.  I setup Apache running with tux on
one server, this being my static content server, having apache proxy all
dynamic content requests to a separate box.  It worked pretty well, and
allowed the dynamic box, a Tomcat-JBoss app server, to have a little more
"breathing room".   I started looking into using port forwarding, but got
busy on some other projects and I haven't come back to this one.  Let me
know if you have any thoughts on using ipchains or iptables to forward
dynamic content instead of apache.  I would prefer to do it with ipchains or
iptables over apache and mod_proxy.

Also, I have thought of possibly running Linux Virtual Server on the same
server as tux, and load-balancing to several dynamic servers on the backend.
Any caveats that come to mind for this scenario?

Thanks,
Mike