Greetings, Kyi. I also ordered a very nice case from amazon, as well. Iv'e always liked the way amazon does business, and they seem to have a wide variety of cases available for the NX7, at very reasonable prices. as far as apps go, the 2 apps I immediately downloaded to my NX7 were beautiful widgets, and go-launcher ex. The former, for the incredible number of beautiful clocks and weather widgets, and the latter, because of the sheer amount of customization possible for homescreens, app docks, app drawer, and transition animations. Also, one of my favorite apps is 'go keyboard'. It's amazing how cool a custom background behind a cool keyboard can be. Loads of themes, as well.
These are a few of my early downloads. I'm sure you will get many replies with others.