I personally have the Linksys NSLU2 with a Seagate 300G USB Drive and have had no problems with it.. Can access the files from the normal windows shares or from its web interface... Plus they have other firmwares out there if you wish to really hack the thing and add mini software packages to it to do more.. Though the one issue I did have with it was my hard drive only worked on the 1st usb port cause supposidly the second is for flash I dunno never tried anything else in it.. So maybe that port would work for the card reader.. could always go to linksys's support page and talk to a live rep over chat and ask..