Well, not playing these last few weeks gave me enough time to build one myself.
Its big : 11 x 14. Its basically a magnetic board my wife found at Wallmart.
For the writable labels, I made little slices of plastic from a CD case, which I filed with my Dremel. I painted the back for the various colors (nice to differentiate between monsters). Double-sided tape and the magnets that came with the board were enough to make these magnetic.
The little markers are simply bits of a magnetic toy I once bought cheap for the magnets – they make for nice reminders for statuses and markers.
Hopefully, it won’t be too cumbersome to actually use.