And after many searches, finally connected to a wi-fi spot. Surfed the web for a while, then came back to the office.

Started playing Marbles.
Went back to the real world and did some work.
Came back to my N800 and the screen was black and I tapped the screen and this message appears: "Not enough memory in target location"

Hmmm.

The only apparent window is the Marbles Game Paused screen.

I do have two 2-GB flash cards installed and have 128MB of Virtual memory setup on the flash card.


Hmm Hmm

So, after two weeks and the numerous slowdowns, several freezes, and the Marbles thingy, I decided to re-flash my device and so far it seems to be AOK.

Hmm. I wonder if one of the apps I installed corrupted something...

Today I also experienced something funny.. I had the N800 just sitting there on the table, with the charger cable installed, network connected, and I had just configured the google talk account for the first time. I can't recall if I had anything else running.
As usual, the screen went black after a while. Quite a bit later I suddenly heard the Nokia sound, and when I looked the device was booting itself! The only thing I can think of is that it somehow ran out of memory.
After that I started an xterm and let it execute a while/sleep/free loop in the shell, to monitor memory usage (there are other ways, but hey, I'm a Unix guy..) but it was completely stable and even though the device has since been switched on for hours it hasn't rebooted or misbehaved in any way. The only other anomaly during the time it rebooted was that the local wireless access point was acting up, I later had to power-cycle the AP to get a stable connection.