I've been playing the PS3 version online a lot over the past few days, and if anyone would like to join me feel free to add me on PSN (PSN ID: SuperVernier). I do have the 360 version as well, but I currently don't have a working 360 to play on.
I do live in Japan, so that's something to account for, but I have played against some people in Europe and in the US' West Coast with acceptable connections.
I don't have a mic at the moment, but I am looking to fix that.