Thank you for you answer,
Well week one is over, and I haven't rooted yet. I guess I have to wait till week two

. It is a tricky decision whether to root or not. All the posts I read previously said that you lose your warranty when you do so. I didn't root yet, so I didn't know that you can reverse rooting.
I have a basic knowledge in Linux, since my laptop is dual boot with Windows Vista and Ubuntu 10. However, in Ubuntu (and Linux in general, I believe), root access is somewhat protected by a password. That is why, whenever I want to install a package, I am asked for a password. My choice of Android as a mobile OS was due to my previous Ubuntu experience, which was not always very easy but in general was a positive one.
I would like to know more about reverse rooting, if you would point out some links and stuff, and how this may affect your warranty.
Best regards.