Senacharim 
Using linux-2.6.32.2 (I forget from where I originally got it...) on the
mini2440--managed to solve my USB mount/unmount/remount riddle and thought
I'd share with everybody.
First, I commented out '/sbin/hotplug' in the '/etc/init.d/rcS' file.
Then, in code (pared down to only useful examples):
[code]
#define FALSE 0
#define TRUE 1
unsigned char FileLock = false;
if (file_exists("/dev/sda") == true)
{
if (FileLock == false)
{
FileLock = true;
system("mdev -s");
}
}
else //file_exists == false
{
if (FileLock == true)
{
FileLock = false;
system("umount /disk");
}
}
[/code]
Do make sure your compiled kernel is set such that it supports FAT file
systems...
If you found this useful, please comment. Feel free to ask questions.
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Peace y'all.