You've posted the output of iptables -L. However, from the looks of it, you're using Lokkit to configure your firewall. Is that true? If so, you're going to have to read the Lokkit documentation to find out how to open a specific port. I don't use lokkit, so I can't offer any advice if you go that way.
If you're working off of your own iptables script, or if you can find the lokkit script, you could add the line I had in my first post. Looking at your input rules, I don't think that you need to put it in front of the REALTED,ESTABLISHED rule, but it couldn't hurt. You may also need to put a similar rule in your OUTPUT table. Just change the INPUT in my first post to OUTPUT.
Your current firewall looks like it allows connections originating from inside your machine to work, but should stop things from coming in. However, you should go visit the first thread in the Security forum and start reading on how to harden your box. One of the easiest things to do is run netstat -l to find out what services are running and shut down any services that you don't use. Firewalls are good, but they aren't perfect and the fewer services you have running the better.