Wow

I just upgraded my router to a Cisco 877 that I got from trademe..and setup into IPv6... 

Its made a huge difference to my gaming & setups..
I (& my brother) have 
- 2  x xBox360s
- 2 x PS3s

I used to have to have port forwarding for 1 Xbox & 1 PS3.. as you can't port forward to both 360s on old ADSL IPv4 modems.
Now, IPv6 allows you to get rid of NAT, and have unique real IP addresses for each console.. and they are fully featured.. and when you do Xbox Live test conection.. you don't get Strict/Moderate issues... as your not using NAT

Also, my speed tests have improved..

Get yourself upgraded.. also IPv6 protects you for future when IP addresses run out...

DC