Google Documents is a wonderful online resource, of course, but up until now spreadsheets have been rather off bounds to mobile users, with just an unfriendly column-by-column view. As long as your phone has a Web-kit-based browser (e.g. iPhone, S60, G1) then there's now a whole new view, with your spreadsheets looking (roughly) as they should and with full editing. Each row can have its elements edited in one go, which is a kludge but also kind of handy. On the downside, the weight of javascript involved does mean that the page isn't that light though, and largish spreadsheets can be slow to open and manipulate. Screens below.
Read on in the full article.