There is one easy solution that will take care of the NAT type.
UpNp is more tricky, the make/model of your modem/router, and your high speed provider will decide whether you can rock it, so it's best to look it up. I'm using a 2WIRE, and they don't currently support UpNp :(
Putting your PS3 in DMZ mode through your modem/router settings can boost your NAT type. I just switched to DMZ tonight and my NAT type went from 2 to 1. Keep in mind that this is not as secure, and some beleive that 2 is better than 1 because it is more secure, and that 1 is not any faster than 2. I dunno, i'm still testing it out myself.
It's still not very fast... (At&t) I'm always looking for more ways to lower that ping, so let me know if you have any questions or if you find anything else out that works.
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