I'm fairly new to the Iphone. I found a free app at the IPhone store called Vlingo. Fairly simplistic. The cool part is that you press a button to record your message and it translates it. You can use it for maps, a search, for a phone message ... and my favorite, to update you facebook page.
The facebook page is amazing, because you simply say your update and it translates very well. You don't have to speak real slow ... but more success if you do. At the end of your sentence you speak "period" and it adds a period. Speak "exclamation point" at the end of your statement and it puts an exclaimation point. It also begins the next sentence nicely when you do so.
Today, I updated my facebook page while driving down the road just to see if I could easily ... and I did. Certainly brings up an interestesting issue with the "no texting" potential "law" out there. Obviously, it makes sense to not text ... or do anything while driving. However, this was actually very simple.
There is lots of potential with this type of program to do some writing using my iphone now.
Hope these insights help your question and expands someones life.