when I typed disktool -l I got this output:
*Disk Appeared ('disk0',Mountpoint = '', fsType = '', volName = '')
*Disk Appeared ('disk0s1',Mountpoint = '', fsType = '', volName = '')
*Disk Appeared ('disk0s2',Mountpoint = '/', fsType = 'hfs', volName = 'Macintosh HD')
When I used disk utility I only saw the hard drive and the optical drive. I assume that one of the 3 above is the card reader, maybe?