Check here: http://www.i14.org/forsale/index.php then clickon the buyers guide at the top of the page.
Those are the names of the designers. Bieker is quite active and is now up to the Bieker 5. The others you cited are referred to as penultimates, the prior incarnation of the rules...
Congrats on the new ride. I assume that you two have wetsuits and pfds and won't go out unattended.
For getting started I suggest that you sail the boat as depowered as possible to get the feel of it. In your case that means starting with the rig raked back some, the board up maybe a...
The want one part was quoted from JDougherty just above.
I have three of them including an OD14 which is sold but not paid for yet, an ICE USA 1108, and an M12 USA 1157. To keep things simple all my mains say USA 1139.
We now refer to the Melges 24 as "the lead mine".