Unfortunately, you have to have a paid premium account with Yahoo in order to use pop forwarding with Outlook. It was a free service until a year or so ago. Most any other pop accounts should work fine including your ISP's. It's simply a matter of entering the correct server and account settings. Check with other pop accounts such as MSN, Lycos, Hotmail, your ISP etc, all of them have some sort of tutorial explaining how to use pop forwarding with Outlook or other mail clients.
- Well it seems you were 2 minutes faster then me.