[frofro]

I wonder if they'll offer it for free.

[radicaldreamer]

It'll be free. It's listed as Twitter for Mac and all of the official Twitter apps are free, regardless of platform.

[jschuur]

I never thought the new Mac app store would have free non demo apps. In realize that the iOS store has free apps, but there, it's the only way to get apps onto the phone for most people.