OLPC Keyboard layouts
Scan-code table
XKB Symbol files
The xkb symbol files used by OLPC can be found at http://webcvs.freedesktop.org/xlibs/xkbdesc/xkeyboard-config/ (Please refer to the xkb_symbols "olpc" sections of the various symbol files[1] for the OLPC-specific keyboard mappings).
OLPC keyboard layouts
Instructions for setting up keyboard switching in Terminal are on the Customizing NAND images page. On bilingual XOs, the multiplication/division key is replaced with a keyboard switching key.
Changing the language of the keyboard is independent of changing the language currently displayed. The language currently displayed can be changed by using the Language section of the Sugar Control Panel.
Membrane keyboard layouts
English (US international); Spanish (Latin America); Portuguese (Brazilian); Amharic (Ethiopic); Arabic; Nigerian (Igbo, Hausa, Yoruba); French; Thai; Urdu; Cyrillic (Russian); Turkish; Nepali; Mongolian; Kazakh; Devanagari; Uzbek; Pashto; Dari; Armenian; Khmer; Pulaar; Italian; Kreyòl; German; Chinese (Simplified); OLPC AZERTY
Non-membrane keyboard layouts
Starting with the XO-1.5 HS ("High School") edition, the XO laptop has a traditional (non-membrane) keyboard available as an option: English (US International); Spanish (Latin America);
Blank Keyboard Artwork
Artwork defining the inner dimensions of the membrane keyboard is available here: keyboard-blank.svg
The SVG files for the OLPC keyboard layouts are here.