I also stumbled upon this problem (no reception) and wrong (old) time and date. Wi-Fi though, worked perfectly, but still date and time would not set itself. The iPhone kept searching for cellular network (it didn't display: 'no service') Also, when i removed the sim card, it did not say 'no simcard installed' so i did worry a lot! Hard reset (home + sleep/wake button) did not help at all in my case. What worked for me, was resetting the network settings. After that the iPhone restarted itself with the right time and date. The iPhone then found the cellular network again, as already stated here: the iPhone will not find cellular until time and date are allright.

About the question NiCd batteries or NiMh; toothbrushbattery.com also use a NiMh battery in their tutorial.

I think the toothbrush does have an overcharging safety build-in. The toothbrush stops charging automatically after a few hours. The charging indicator light also stops pulsing then.

The trackpad from my macbook air would not click anymore. The pointer still worked, i could still tap and hoover around.

My guess was that something fell between the trackpad and the housing.

And I was right, it was a bread crumb or else of a little seed.

While following this guide, I saw that a little magnet underneath the unibody is lifting the trackpad up again, after being pushed down. Right in that tiny space was the little bugger :)

I'm with Stefan, about his comment by step 8. I actually did destroy one screw (there sat really, really tight) and had to use brute force with a pincer and a tip of WD-40 to loosen it. It seems like Apple took that into account, since there are enough to leave one out :)