Well, there are different types of
DVC &/or Member pins in circulation. Here's what I have in my collection:
DVC Resort pins - You can find these at the Resorts and selected pin carts/displays in WDW and elsewhere (I even found them at HH).
DVC Member pin - You can purchase these at DVC Resort gift shops and selected pin carts (such as the one at BW). They are kept behind the counter and you must show a valid DVC ID card or your Resort card with "DVC Member" printed on it for purchase. There are two styles out in circulation. Both have a white background with DVC logo.
DVC Special Edition pin - These were sent to all current DVC Members to commemorate the opening of the VWL.
DVC CM/sales pin - These have a blue background and gold edge, produced during the Millenium Celebration. In order to get these you must either trade for it, chat with a DVC sales rep who might give you one if you ID yourself as a DVC Member or buy one from a trader. The DVC sales staff will tell you that these pins are not to be traded.
DVC Sand Breaking pin - Produced to commemorate the ground breaking for the new BC Resort.
If I find some pictures to go with these descriptions I'll update the post.
DVC Member pins
DVC CM/sales pin 2000 - HTF
DVC CM/sales BC Sand Breaking pin - HTF
Disneyana 1999 DVC pin - HTF
HTF - indicates a hard to find pin. You will have to make a big trade or pay a premium in many cases in order to get this pin.