Gone are the Pokémon Centers, Shops and Gyms. Gone are the houses, villagers and friendly Professors with angry nephews. It's just you and 5 generations of wild Pokémon. And you're pretty sure someone out there wants you very, very dead.
There's a new version of P:SI coming out as soon as I fix some bugs.
In it, you'll be able to select Gen IV and V Pokémon as starters. Still won't find them in the wild yet, but I'm working on it.