For instance, it is not possible (or I couldn't see how) to select a range of cells to copy them, in order to paste them in an extendend range. I can't cope with the idea to copy one cell and paste the same formula in 30 other cells, one by one. Docs to go (I got the paid for version) also didn't allow me to select a cell as an argument for a formula, and had to manually insert its coordinates through the keyboard. Thinkfree allowed it, but on the other hand when I inserted something like =C5+D5 and clicked return, there was no calculation and the input stayed there, treated as a string instead that as a formula (but I hadn't inserted any apex before the equal sign). Maybe I had to use an insert function menu instead than the = char, but then I was too annoyed and closed the thing. Furthermore, you find all the special chars = ( ) ; : and alphanumerics in different sections of the virtual keyboard, so inserting a formula needs a lot of fiddling. Today I tried to compose the same spreadsheet (a simple work hour recording monthly archive) on my N900 with gnumeric, and the experience was absolutely pleasant and flawless for one that is accustomed to using a spreadsheet on a desktop machine. I think that the gui of spreadsheets or - more generically - of productivity apps should make full use of multitouch, e.g. to select cells ranges or move cells. By now, both docstogo and thinkfree remind me the way they're used on S60 or other thumbs-only interfaces, and they need much too fiddling with menus to be productive. Otherwise, maybe using an external hw kbd could be useful, but I haven't tested it yet.