Not sure if there was one started yet so I figured I would get one going. It's definitely that time of year again.
I will first list the confirmed drivers and teams and then a list of speculations. Feel free to add any new developments or updates here too.
Target Chip Ganassi Racing - (Honda Engines) Scott Dixon, Dario Franchitti, G2(satellite team) - Graham Rahal, Charlie Kimball
Team Penske -(Chevrolet Engines) Helio Castroneves, Ryan Briscoe, Will Power
Andretti Autosport - (Chevrolet Engines) Marco Andretti, Ryan Hunter-Reay
Panther Racing -(Chevrolet Engines) JR Hildebrand
Sam Schmidt Racing -(Honda Engines) Simon Pagenaud
HVM Racing -(Lotus Engines) Simona De Silvestro
Sarah Fisher Hartman Racing - Josef Newgarden
AJ Foyt Racing -(Honda Engines) Mike Conway
KV Racing Technology -(Chevrolet Engines) Tony Kanaan
Ed Carpenter Racing - Ed Carpenter
Bryan Herta Autosport -(Lotus Engines) Alex Tagliani
Teams with unconfirmed drivers at this time are..
Dreyer & Reinbold Racing -(Lotus Engines) Rumor has Katerine Legge driving for them with Truecar.com as the sponsor.
Dale Coyne Racing - Hopes to return with 2 full-time cars. James Jakes & Sebastien Bourdais highly probable.
Michael Shank Racing -(Lotus Engines) Plans unknown.
Conquest Racing -(Lotus Engines) Plans unknown.
Dragon Racing -(Chevrolet Engines) Plans unknown.