I think we could have a lot of fun with this. I'm working on an an army with an Atlantean type theme so it will predominantly be a water/sea based type of army. Maybe they have emerged from the Icy depths because an ancient prophecy of Chaos doom has come true (the emergence of a Kraken from a thousand year sleep maybe).
Anyway, if anyone is interested and think they can come up with an army worthy of discussion and maybe a 2000 pt battle please reply to this post (click on 'comment' below - you don't have to sign up, you can comment anonymously). I'll happily post all the army details on my site and a poll so the readers can choose their favourite. We can even forward the details to Games Workshop and hey, you never know what might happen then !
I'll be working on my crab men, giant flying fish and Atlantean trident guard tonight :)