Joystick listed the amount of memory some of the launch games require, seems that if you don't want to download titles that 4GB card will last you a lifetime.
"Army Corps of Hell - ~2.1MB (2147KB)
Asphalt: Injection - None!
BlazBlue: Continuum Shift Extend - 2MB
Dungeon Hunter: Alliance - Zilch
FIFA Soccer - 160MB
Hot Shots Golf: World Invitational - 4MB
Little Deviants - 1MB
Lumines: Electronic Symphony - 2MB
Michael Jackson: The Experience HD - 300KB
ModNation Racers: Roadtrip - ~1MB (1056KB)
Rayman Origins: 5MB
Shinobido 2: Revenge of Zen - 4MB
Ultimate Marvel vs. Capcom 3 - 4MB
Uncharted: Golden Abyss - 64MB
Wipeout 2048 - 8MB"
http://www.joystiq.com/2012/02/13/joystiqs-retail-vita-collection-requires-255mb-of-storage/
I haven't read too many Uncharted reviews, but I must really recommend EDGEs review, yes it's "only" given a 7/10 but is really well written as you would expect from EDGE and changed my mind from 'might get' to 'getting at launch' as regards to the game.
http://www.edge-online.com/reviews/uncharted-golden-abyss-review
What else is new? Well TheSixthAxis has a new preview of Unit13 and man are they loving this game. I really thought it would turn out to be a terrible game but I might have to change that perception. Will keep an eye on it for sure.
http://www.thesixthaxis.com/2012/02/14/hands-on-preview-unit-13-ps-vita/