QOS (Boost your PS3's priority on your network)
I just found this setting on my linksys router (WRT-300N); you can set your internet access priority. What I'm saying is that you can devote your entire network's bandwidth to your PS3 when your PS3 is turned on. Only drawback to doing this is that any other computer on your network will get bumped off your network (as long as you have your PS3 on). I was playing with the feature (I set the PS3 to high priority) and when I logged onto my PS3 with my PSP, my wife lost her internet connection on her laptop.
This setting would be very useful to those that want to make sure that they have enough bandwidth to game online with and also to make the system download faster.
Kudo if you think this is useful.
D-Link routers have a similar feature as well.