Sure, I don't think BrodieSWR has begun working on another batch of maps yet.
Brodie, this will make things a bit trickier because we'll need to increase the water percentage and we'll want the water provinces mostly centralized, rather than all over the map. In terms of number of provinces, since there's only one water nation and only one amphibious land nation I'd say the water nation should have an equal or slightly lower number of provinces than the land nation average.
The map is finished! I have to leave for work now, so I don't have time to set the provinces/neighbors/start locations etc. right now, but I will do it when I get home tonight!
Here is the semi-finished product for you guys to look at if you want to while you wait. Feel free to load it up in the Map Editor to check it out!
I also included a small preview image. Remember, the quality is reduced. :P