Hi, 
I just buy a Gumstix with NetDuo MMC et audiostix 2. I'm able to connect to the gumstix via ssh and all seems to work well but i'm not able to mount my mmc card. I have comment out in /etc/modules the pcmcia line and uncommented the MMC lines but this does solve my problem.
(Note : my 64 MB mmc card is note an rs-mmc card and it is quite old)
Here it is my version :
# cat /etc/gumstix-release
DISTRIB_ID='gumstix'
DISTRIB_DESCRIPTION=''
DISTRIB_RELEASE='1078'
DISTRIB_CODENAME=''
BUILD_DATE='Wed Aug 9 17:52:53 PDT 2006'
BUILD_HOSTNAME='azazel.hughes-family.org'

When a enter  : mount /mnt/mmc the error is the following :
mount: Mounting /dev/mmcblk0p1 on /mnt/mmc failed: No such file or directory

Anybody have a solution to my problem.

Thanks
Ronan