Want to display your PSN ID as a signature on a forum or your blog? Now you can, over at PlayStation Underground. All you need to do is register for a PlayStation Underground account (if you don’t already have one) and link your PSN ID to it.
You will get some HTML code that you can copy and paste directly onto your website or forum signature box. The Online ID will display your PSN name and the “About Me” part of your PSN Profile. The service will also let you see who is online and what they are playing from PlayStation Underground.
Example:
can u chat to people that are on the ps3 when u are on the comp