Welcome to tek-tips.
Would you please clarify by what you mean by to "a webpage on another ubuntu 10.04 server"?
I am assuming you have one public IP address with your server on a LAN with NAT. The easiest thing to do would be to port forward to the server you wish to use. Apache supports multiple virtual hosts and can handle multiple sites with different names, even with the same IP address.
Otherwise, you are looking at some solution involving either a reverse proxy, which Apache can do, or using redirect or rewrite rules. Having a better understanding of what you are trying to accomplish would help to give you a better, more specific, answer.