You have the portal set to be enabled on the opt1 interface? Did you add a rule to allow that subnet out of the firewall? By default it won't allow traffic on that interface to pass. You need to add an allow rule under Firewall -> Rules -> opt1
Have you tried removing the 2wire device and testing with just a wired connection either directly into the pfsense box or through just a hub or switch? I had nothing but bad luck with those 2wire devices 3-4 years ago when I tested them as DSL CPE.
Something else to try, can you go to http://192.168.1.1:8000 ? (assuming that the opt1 address is 192.168.1.1)
I just set this up to test and it works fine for me (minus the 2wire device). I'll wager you just need a pass rule for that subnet on that interface.