If you want lower pings, get SDSL. Gamers favor that over anything else at the moment.
You do realize that ping does not lower with raw bandwidth, right? If you had a two gigabit connection (both ways) with your ISP and them to their source, you would not be able to play games with a ping like that of a small network or a lot lower that what you get now even. What matters most is what lies between you and the destination. If a game only uses up to 8KB/s of bandwidth, it does not help to have 300KB/s over 150KB/s of bandwidth at your disposal (assume synchronous connections). It is true that ping increases as more of your bandwidth is used, but what we have right now isn't bad at all. If you can't wait 40ms for data from your machine to get to the server and the server to send data back (yes, that's 40ms for a round trip--that's a "ping") then you really have some sort of deficiency. The typical human doesn't even react to a scene in that time. Thanks to the wonderful client/server models used in games like Half-Life though, low ping people have a serious advantage due to position history inaccuracies which allow lower-ping players to hit laggers, but rarely the other way around.
-edit-
Jason's post wasn't there when I started typing just to let you all know.