Meanwhile I remembered that I've got a "new" 2nd-hand notebook (not yet in regular use) that features a SD card slot. So following my own advice I did:
tc@box:~$ tce-load -wi pci-utils
tc@box:~$ lspci | grep SD
02:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)
02:06.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller
After I inserted a SD card I found out that the system took note of that action and what it "saw" on it:
tc@box:~$ dmesg | tail -4
tifm_core: MMC/SD card detected in socket 0:1
mmc1: new SD card at address 296f
mmcblk0: mmc1:296f SM02G 1.87 GiB
mmcblk0: p1
tc@box:~$ fdisk -l /dev/mmcblk0
Disk /dev/mmcblk0: 2014 MB, 2014838784 bytes
64 heads, 63 sectors/track, 976 cylinders
Units = cylinders of 4032 * 512 = 2064384 bytes
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 1 976 1967489+ 6 FAT16
So I used sudo rebuildfstab in an attempt to prepare for the mounting of the file system, checked the new entry in '/etc/fstab', mounted the filesystem and confirmed that I can "see" then content of it:
tc@box:~$ grep mmc /etc/fstab
/dev/mmcblk0p1 /mnt/mmcblk0p1 vfat noauto,users,exec,umask=000 0 0 # Added by TC
tc@box:~$ mount /mnt/mmcblk0p1
tc@box:~$ ls -l /mnt/mmcblk0p1
total 96
drwxrwxrwx 3 tc staff 32768 Jan 1 2007 DCIM/
drwxrwxrwx 2 tc staff 32768 Jan 1 2007 MISC/
-rwxrwxrwx 1 tc staff 296 Aug 29 2008 WMPInfo.xml