Thanks for all the responses.
Well, I couldn't resist buying a MobileMate 256 MB for $18.88 from 
Wal-Mart.  The brand isn't noted on the box anywhere, but if you open up 
the packaging and read the warranty, you'll see it's from SanDisk.  I 
mounted it using /dev/sd0, and work's just fine.  I'll post the output 
from dmesg once I get back to my home computer.

Thanks,
Yasir