Alright, here's what I know. It's not like an MMO, but you can have two to eight people visit your town.
Sort of like Animal Crossing, know what I'm saying?
It's not for a handheld console, but no targeted consoles have been announced.
Rumor has it that it's another version of Bokujō Monogatari: Yōkoso! Kaze no Bazaar e only for a non-handheld system.
That's all I know. Mostly rumors, but still...