Yup, Google announced the merging of Writely and Spreadsheets to form Google Docs & Spreadsheets. Danny has the lowdown on this here.
You can access it at http://docs.google.com/.
But wouldn't it be cool to have this integrated directly with one's AdWords or AdSense or even Sitemaps accounts?
Have your reports exportable to Google Docs so you can easily manipulate them and easily share them with clients.
That is a request asked for at DigitalPoint Forums.