Interesting to see that WriteWith seems to take GoogleDocs head on! There seems to be a few parallels between what Kiko attempted and how they were hosed by Google Calender and what WriteWith is attempting.

The difference here being WriteWith launching after GoogleDocs and it being marketed differently. Looks like WriteWith is creating a niche within collaborative doc editing, by catering to and marketing as a collaborative blogging platform. Brilliant concept! Truly catering to the long tail of bloggers!!