From their announcement:
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.