I've been reading this forum for a while, and there are a few things I would have *dearly* loved to know when I first got my cybook, so I thought I'd put them in one place.
1--ALWAYS use the Safely Remove Hardware button when removing the cybook or the SD card from the computer, and wait for it to say it's safe. If you don't, the computer may not be done transferring info onto the flash memory and that can cause corrupt files. (This may not prevent corrupt files, but not doing it...)
2--Make a back up of the service files, in case somehow they get erased from the cybook. I'd say do it immediately and put it on a DVD so it can't get erased or corrupted. Otherwise, you'll have to wait for Bookeen to help you instead of reading

.
3--Reformat the SD card to FAT32, the file system in the cybook, if it isn't already. This seems to help the cybook work with the SD card.
4--The SD card is inserted with the contacts facing the front.
5--The power bar is not accurate for the first several(I don't know how many) charges; it has to calibrate itself. Just be aware that at '40%' the power may be almost gone.
6--When the battery is out, the screen remains on the page it lost power on. It takes power for the cybook to *change* screens, not stay on them, so you won't be able to turn the page, go to the library or anything. Just charge it for a while and it'll be fine.
7--Pushing the reset directly shuts off the device, it doesn't clear the screen. Visibly, it turns off the LED. Turning the cybook back on will cycle the firmware.
8--If the cybook is having problems, try taking out the SD card; some cybooks only like certain cards. It's unclear what the problem is or why they like one card and not another.
I hope this makes using a cybook easier. Does anyone else have things they would have liked to know at the beginning?