Items are added sporadically, so I check for updates every few days.
And, I'd point out that app development and porting for the 770 is a two-way process: if you want something ported, make the developers aware of your idea (they might not know how cool their app would be running on the 770!). If something's not being ported fast enough, let the dev know (nicely) that you're anxiously awaiting the fruits of their labor!
