For the records: overclocking does not seem to be the culprit, as I am getting spontaneous reboots in certain moments still, with conky showing me 250 MHz. Loading the bleeding edge drivers sometimes leads to my N900 giving up, from time to time. Getting the N900 to access my home WiFi when coming back from 3G/3.5G to the home-office always requires a restart frenzy (sometimes I just give up).

I have not been able to return to my home WiFi to be encrypted yet, which gives me a headache (There is some equipment in the WDS setup that disallows WEP, and WPA/2 does not work at all yet with my N900).

I do realize that a WDS, comprised out of several APs might not be the preferred terrain for the N900, but unfortunately, that's how things are here.

So I am struggling on with my spontaneous reboots.