1. No

2. As stated above this might be a settings problem of your router.

3. "simple brightness applet" adds fast control over your screen brightness and an always on button to your status menu

4. Anything updating things over wifi or 3G

5. The readings are not very precise, don't worry about. Also battery power will improve with the first few charges

6. due to law cases it cannot be shipped with the global version, don't know what is the exact difference but global is has no restrictions I guess