Yeah, it would be ideal if you could try it first since speeds and results will vary based on how far you are from a tower, etc. I can tell you that I'm confident it would work. I game in a room in the basement of my house and it was very playable through the phone. I have given serious consideration to their HomeFusion product, especially if it does give you a public IP so that I could get a consistent open connection. For me, the $60/month is too steep, but I have the DSL available. I think if I didn't have that option it would be a no-brainer for me.
Read. Think. Post. In that order, preferably
"If the Playstation and Xbox are like the Bloods and the Crips, then the Wii is whatever gang Sha Na Na was in" - Christian Finnegan