Matt Gemmell offers a list of his favorite productivity apps for iPad:
The oft-repeated fallacy that the iPad isn’t a tool for productivity and creation has no credibility whatsoever. Anyone trotting out that old chestnut is either labouring under some astonishingly wrong-headed preconceptions, or is making excuses for their own failings.
Gemmell’s choices match mine with one exception - I prefer iA Writer over Elements.