From a reliable source who translated one of the Japanese BBS is a list of fall 2005 announcements from the latest issue of the Japanese Model Grafix magazine. (I haven't seen it in person, so I can't guarantee, but I assume these kits are confirmed)

< TAMIYA >
1/24 Peugeot 307 Monte Carlo
1/24 Ferrari F40GT 1992 Italian GT Champion
1/12 Semi-assembled Carrera GT

< AOSHIMA >
1/24 AE86 with and without engine
1/24 FC3S early and late

< FUJIMI >
1/24 (Resin kits of) Maserati MC12 Coupe and Spider
1/24 Nissan Cube EX and SX
1/24 Lancer Evolution IX GSR and GT
1/24 Murcielago Roadster
1/24 Ferrari F430
1/24 Dino 206 Competition (w/ pre-painted body) I assume 206S

Revell of Germany has also announced a Ferrari F430.