Gnumeric is available in extras repo.
Current versions:
1.10.12-2 in Extras
1.10.17-1 in Extras-devel

This edition of Gnumeric comes with some special changes for Maemo 5:
* start typing to enter edit mode with overwriting existent content of the cell (hit ENTER or one of the arrows to exit edit mode and apply changes)
* hit ENTER to enter edit mode (use LEFT and RIGHT arrows to move cursor in the edit line, press UP or DOWN arrow to set the cursor position at the begining or at the end of the edit line. Press ENTER to exit edit mode and apply changes)
* supports opening documents through Maemo File Manager
* use volume button to zoom in/out
* double tap on column/row header to open column/row popup-menu
* double tap on a cell to open cell popup-menu
* new keyboard shortcuts:

- Ctrl+Space - toggle full screen mode on/off

- Ctrl+Comma - toggle standard toolbar show/hide

- Ctrl+Period - toggle format toolbar show/hide

- Ctrl+P - toggle object toolbar show/hide

- Ctrl+M - show Manage Sheets window

If you want to report a bug, please do it on the bugtracker.
Feature requests please submit here.

Gnumeric is a spreadsheet application that interoperates well with other spreadsheets. It comes with plugins that enable it to deal with
commonly used spreadsheet file formats.
The following formats can be imported and exported:
- Microsoft Excel 2007 (.xlsx);
- Microsoft Excel 97/2000/XP (.xls);
- Microsoft Excel 95 (.xls);
- OASIS XML, OpenOffice.org XML, StarOffice (.sxc);
- Comma/Character Separated Values (.csv);
- Data Interchange Format (.dif);
- Applix version 4 (.as).