I think this looks promising. Accept that google had it for couple of years. But it was never that good to work on! For a person who's so used to the Microsoft office products, this is the best bet, I would say, even though the features are a lot cut down.
Open office and google docs used to serve the purpose. But from the first look, I'd be more comfortable in this one, because it gets me the same look and feel as the standalone application. And its pretty sleek and fast too...