Well our 110th anniversery are going to be unveiled any day now I assume as Lazio plan to wear the new jerseys in the new year. Still the rumor is that it will look like so(LaLazioSiamoNoi):

On another note, there are some African 2010 kits that has been officially unveiled and Lazio's next year puma jersey can potentially look like so:
Tunisia

Egypt

Angola

Ivory Coast, Cameroon, Ghana

This seems to be a tight fitting shirt which definitly makes the jersey more appealing. Also, on the top left of the jersey you can see a fade of their own unique national significant symbol. If these jerseys carry on the club jerseys for 2010, then you can bet that the Aquile will be put on the jerseys and would look brilliant. I hope this is the jersey template for club 2010 jerseys also.