I use the following
http://http://www.card-media.co.uk/x...pro+vp3310.htm
superceded now but I use it all the time (put my own hdd in it which made it a bit cheaper.
plugf in the memory card, press one button and wait till it has finished.It creates a new folder everytime you transfer, so it would create a cf1, cf2 and xd1 if you had trransferred from 2 compact flash cards and one xd.
When you get home plug it in via usb and browse the folders. I dont know whether colour screens are worth it, for battery reasons and as some dont work with raw. Mine will work for a week without reecharging, copying at least one almost full gb card a day. recharges through USB or a supplied ac charger.
John R