Google announced today you can edit your Google Docs on your iPad. This is very exciting. We bought Documents 2 Go to be able to do that, but being able to do it natively is appealing.
It hasn't apparently rolled out to my account yet. I just tried it on my iPod Touch and didn't see it. The family iPad is at work now (it has a job, I'm still looking), so I'll have to wait until at least tonight to try it out on the iPad.
The video shows them editing on an Android phone and the iPad. If you edit on the Android you can add text with your voice.
So far it looks like only documents, not spreadsheets or presentations.