I started generating the map and had one that kind of worked, but the map files are huge for 4096. We're talking 65mb per file. So not really an object for a file transfer.
I have a brand new 2048x2048 1x server if you may be interested in. I work from home, so I can get things up and running quite quickly for updates.
It's not one land mass, but I feel like I did a pretty good job generating, populating it's biomes, and I'm pretty proud of it. My Server's Map.
The server is called Lagenon.
If you still really want the 4096 map, I could give you the actions file for the WGenerator, so that it will load it up and you'll just have to save things locally.