I am guessing that you may need to forward a specific port in the hub for the additional chat info.  There should be info on this on the appropriate PS3 website. I you can find which port to forward, I can help you from there (although there is no guarantee of success!).

I also found this if it helps.

TCP (6)      80      Outbound      Standard HTTP (web browsing)
TCP (6)      443      Outbound      HTTPS (secure web browsing)
TCP (6)      5223      Outbound      Secure Jabber (for online chat)
UDP (17)      3478 - 3479      Outbound + Inbound      STUN (Simple Traversal of UDP through NATs)
UDP (17)      3658      Outbound + Inbound      Playstation Network

OK

You access the hub manager by typing bthomehub.home into your browser.  From the homepage, select advanced, continue to advanced, usename and p/w both 'admin', then application sharing, configuration.

From here click the 'click here' in the second paragraph of text to create a new application.  Give it a name and select manual entry of port maps. 

Create the port maps as described in the reference you sent. Click ADD to add each range of ports.  When complete click APPLY.  This will save your new application configuration under the name you gave it.  Then in application sharing you can select your new config which should now be listed in the drop down box and apply it to your PS3 which should be one of the devices listed in the device drop down box. Click ADD.

I have not done this myself, so you may have to play with it a bit.  If you make a mistake, you can modify or delete your configuration via the 'modify a game or application' link under 'application sharing'

As your game seems to be basically working without forwarding any additional ports, I would start by just forwarding 3658.

Protocol      Port Range      Translate To ...      Trigger Protocol      Trigger Port      


udp              3658

                   to

                  3658               3658                        udp                         3658



would this be right?