I use Colemak. It's supposed to be easier to learn than Dvorak, and it leaves some keyboard shortcuts intact (e.g. ctrl+zxcv). There is a colemak.vim file that completely customizes vim for colemak. Warning: it changes nearly every single key binding.

The only downside to colemak is that d is next to t. This sometimes makes it difficult to type Dutch, because some words end with "dt". A typo "td" is easy to make.