I am trying to forward everything that is coming into server A on port 80 to server B on port 80 using ssh. The way I originally tried this was by typing in "ssh -L 80:serverB:80 serverA" from the server A terminal. This would only start forwarding from 127.0.0.1, so anybody connecting to server A would not get forwarded.

Now I am trying to use the "ssh -R" command to get this to work. The way I tried this was, from the server A terminal I type "ssh -R 80:serverB:80 serverA". For some reason this doesn't work. I have looked at the syntax for this command many times and I cannot figure out what is wrong!

No dude. WTH are you doing? SSH port forwards within it's session, and that's it. It is not a VPN, which is what you're trying to do.

http://openvpn.net/

If you just want to port forward to an IP without encryption, like if the server is connected on the same switch(which I hope it is), then you would do that with iptables. SSH is a userland volatile app. You don't use that to maintain services.