I've effectively setup plone 4 and am using apache2 rewrite also it appears to operate. However , this content for that site doesn't appear properly.

NameVirtualHost *:80
<IfModule mod_proxy.c>
<VirtualHost *:80>
ServerName elzwhere.net
RewriteEngine On
RewriteRule /static - [L]
RewriteRule ^/(.*) \
    http://localhost:8080/VirtualHostBase/http/%{SERVER_NAME}:80/et/VirtualHostRoot/%1 [L,P]
<Proxy *>
    Order Allow,Deny
    Allow from all
</Proxy>
</VirtualHost>
</IfModule>

By trying for connecting to elzwhere.net you will notice what I am speaking about. I am not quite sure what's going on here.

Thanks ahead of time.

Try $1 rather than %1 following the VirtualHostRoot.

You possess an error inside your rewrite rule use $1 for that regular expression substitution in the finish there.

Later on, better make use of the RewriteRule Witch to create your Zope rewrite rules, it constructs the right rule perfectly each time!