http://battleping.com/

Anyone use it? I will try it later today. The webpage says that they support FFXIV but on their forum i didn't found much information about that.

I have all ready improve all what i could on my pc and network (Nagle, TcpNoDelay, QoS, ADSL2+ mode) and i went from 500~ms to 350~ms. I think it use SSH to connect directly to a server that connect you to the game. In theory it should improve me a little more the ping.

BTW i live in Argentina.