Possibly dumb question follows...

Up to now I've got pics off my cameras by plugging the CF card into a
pcmcia slot on a laptop - it "just works".

Now I have to look at getting data of SD cards and so dug out a USB
card reader which probes as:

Mar 26 21:38:44 very /netbsd: umass0 at uhub0 port 2 configuration 1 interface 0
Mar 26 21:38:44 very /netbsd: umass0: Acer Labs USB 2.0 Storage Device, rev 2.00/0.80, addr 2
Mar 26 21:38:44 very /netbsd: umass0: using SCSI over Bulk-Only
Mar 26 21:38:44 very /netbsd: umass0: no buffer memory

but plugging a card - SD or CF makes no difference, doesn't achieve
much.  wd* and sd* all claim to be unconfigured.

Do I need a specific driver for this job? 
Do I need a kernel that supports more than wd* on umass?

Clues appreciated.

Thanks
--sjg