Yeah, NU is fun. Lots of favorite pokemon are very usable down here, like Ursaring and Raichu.(not mine)
First, the Ladder is on Doug's Create a Pokemon Server. Its generally 3rd or 4th down the line.
Second, go to the site in my sig. Its our NU forum, where we discuss the tier. Start with the helpful articles, for some basic introduction to the tier, but keep in mind that most of them are fairly outdated, and that Leafeon, Cloyster, Miltank, and Slowking (among others) are now banned.
Another useful resource is our old smog articles. These give a very good description of the metagame as it was and, to a point is.
We have an Espeon analysis on Project NU, so I'll let you check that out, but Ninetails pretty much has to use a Nasty Plot set, and to my knowledge investment in bulk is pointless, so basic sweeper EVs (252/252/4) with NP, STAB Fire move, Energy Ball, and Hp rock/water or hypnosis.
Welcome to NU.