I have always had a small problem on my C3100 where if you suspend the zaurus while connected to wifi the connection will not work when unsuspended again.
For example; i'll connect to my AP, everything works fine. Then I suspend the zaurus and then turn it back on the wifi card is still "on" as if it is connected but I can't ping anything any more. I have to then disconnect it and reconnect it to get it to work again.
Anyone ever find a solution to this issue? My old 5600 would always work just fine this way.