The first draft of Grandeur, the official expansion of Impetus for the Napoleonic age, is online. The expansion is freely available in 3 languages: English, Spanish and Italian. Grandeur requires Impetus rulebook to be played but this expansion is the first step towards a stand alone Napoleonic rulebook that could be released in 2011. Available for free also 5 army lists (France, Austria, Prussia, Russia and Great Britain) with a points system. Have fun.
Dadi & Piombo have posted a preview of their free Grandeur: Impetus in the Age of Napoleon rules. From their announcement: