Current Line-Up is as Follows:
So there are still plenty of open spots.
Only team that is really complete is the Iwa team, though they don't have a Sensei.
Leaf Village:
Aiko Uzumaki - Genin
Kota Uchiha - Genin
Kokai Ekirei - Tokubetsu Jonin
Ria Uchiha - Jonin
Stone Village:
Kii - Genin
Ryou Hozuki - Genin
Shira Aburame - Genin
Sand Village:
Daisuke Fukui - Genin
Missing Nin:
Kai Yatoma {Leaf}
Jinchuriki:
Shukaku/One-Tails - Daisuke Fukui
Matatabi/Two-Tails - Kota Uchiha
Isobu/Three-Tails - Open
Son Goku/Four-Tails - Open
Kokuo/Five-Tails - Open
Saiken/Six-Tails - Open
Chomei/Seven-Tails - Shira Aburame
Gyuki/Eight-Tails - Kai Yatoma
Kurama/Nine-Tails - Aiko Uzumaki
Hokage(Konohagakure) - Oda Uchiha
Tsuchikage(Iwagakure) - Open
Mizukage(Kirigakure) - Open
Raikage(Kumogakure) - Open
Kazekage(Sunagakure) - Open
So there are still plenty of open spots.
Only team that is really complete is the Iwa team, though they don't have a Sensei.