Free iPhone TouchType Email App
If you don't know about TouchType, it's an iPhone app that gives you a larger, horizontal keyboard to use for typing out emails. It also has the ability to save text snippets so that if you're sending the same response to an email several times over, you don't need to retype it. Pretty good idea and it's been met with success. Now there's a free version that will do the same things, with exceptions. There's no Twitter integration and no spell check. The paid version has both, at $.99. I know where in an economic downturn, but $.99 for a spell check and Twitter ... I think it's worth it.