I have noticed the same problem lately with my n800. I have been using the iGo for a few months now with no problems.

This week I have had the exact same problem you have described.

I think it may be that the batteries are not seated properly. I have noticed that after the keyboard gets disconnected, the lights on the keyboard no longer light up.

I have had some luck re-seating the batteries.

Not sure why it started happening all of the sudden?

Any one else?