I'd like to just throw in some helpful points as a few people been experiencing problems with Adhoc party
-First off NAT type shoud ideally be 1 or 2, 3 doesn't work well at all, just google PS3 Nat type 2 for pointers there's even youtube vids to help you out.
- Second you can turn a portable wireless laptop into a router for those who have their PS3s nowhere near their router, simply hook ethernet cable into laptop click on network sharing go to connections, highlight both connections (your wireless connection and the ethernet one) right click and then click bridge connections, go to your ps3 set up the wired connection and bada bing no need for 50 ft cable!
- Third from what I've seen using different country adhoc party on a different country account i.e USA account playing UK adhoc doesn't seem to work well, may be due to the recent update >.> simple solution just play on an account that is the same as the adhocs version.
Last tip that I can offer is, make sure adhoc channel is automatic, other then that, I have no idea what else causes these disconnect problems people get, hope some of this helped anyone who needed it.