Lo trovate su Handango, 49.95$ per la precisione. Solo per chi non ce l'aveva già incluso in ROM.
1) If you have a Windows Mobile 5.0 Pocket PC or Windows Mobile 6 device that came with Office Mobile you can use the FREE upgrade to get support for Office 2007.
2) If you have a Windows Mobile 6 Standard device (ie Smartphone) which didn’t come with Office Mobile (eg. The HTC S620) then you can buy Office Mobile from the Handango Retail store.
3) If you have a Windows Mobile 5.0 Smartphone there isn’t unfortunately an upgrade path or way of getting Office Mobile.
Fonte: Office Mobile 6.1 - you can now buy it online
P.s. certo che con Documents To Go alla metà del prezzo... e supporta pure i PDF...