Drops tomorrow, $25 for all of Season 1 and 400 Days.
No word on file size, and it doesn't seem you're able to do any type of cross-saving with it. ...which is pretty stupid.
Still - Telltale's The Walking Dead. I can dig it.
[update] Oh, also, speaking of Vita - Spelunky drops on the 27th and DiveKick is tomorrow. [/update]