Interesting project.  I want to do the same thing.  I am looking for schemastics and pinouts. Also I would like to know where to buy the ML connectors preferable on ebay

if your not on a tight budget I recommend to most to run 3-4 Cat7 lines to each location they think they may put equipment, wether it be B&O or not. That will allow for multiple configurations and sources for most scenarios now and in the near future. For the little more you'll pay now, you won't be cornered later in your decision making. 

Well, my plan is to wire up each of the drops with minimum CAT7 cabling to ensure that I can have both a ethernet and masterlink connectivity.

What I'm looking for are following:

• Combo PL + 230V to drive BL8000 or plain single PL jacks
  
• Combo ML + 230V to drive BL3500 or plain single ML jacks

For above I'm intersted of suggestions for both wall and floor mounted jacks and what else of creativity fellow BW users has to suggest. So highly interested of pictures of above including how you done on your own side.

For example how has other solved to hide the power supply for BeoCom and BeoTalk? Are you using plain PVC coundit pipes? In the current house I've managed to get 4xCAT5e cables into 20mm PVC coundit pipes for my normal ethernet (not big fan of wireless if I can avoid it).

Well, here is the init draft of the unit placement in the current building; the image shows (from top down) 2nd floor, first floor and the tiny basement.

The plan is to wire up the house with a star network using double CAT7 cabling to be used for Ethernet and BeoNet; then the idea was to wire up one seperate segment for the old MasterLink; this would then not be a star network. Guess that I'm not the only one which has headache with mixed old units and as well waiting for the new BeoNet

What I would like to verify with above ML-schematic if it's correct from the perspective that I'm able to play music on the BS9000 and 1) make use of only the left set of BL8000 and as well 2) making use of all 4 BL8000. At least it's my understanding that the BS9000 should be able to make use of the speakers connected to the BV10; but then again; does it work with above examples? Also, what option value should be used for the various units?

Well, been looking around and as it's an old house that I want to build the digital ML I'm going for bakelite sockets; here is how the antenna jacket looks like:

and the modular jacket (cat6a):

Well, you can make use of RJ-45 connectors instead of ML connectors; B&O already now offers such cabling; RJ-45 to ML connectors. Check this