Square Enix is currently regenerating their retro Final Fantasy line which started with 1 and 2 on a GBA cart with 4 coming on the Advance in June. But in July (in Japan at least) Final Fantasy III will be out on DS. The interesting news from Famitsu is however, the game will feature Nintendo Wi-Fi connection for online Final Fantasy battling and the like.
Look out for more news at BGB for American/European release dates and more info on what FF Wi-Fi will entail.