As for the geometry of a "urban assault" bike I would hae to say that keeping it a little bit slack would be nice. I don't mean touring bike slack either. The thing is that so many of us here ride old converted road bikes that have horizontal drops and we don't really know the difference in a "real track bike" and its geometry. Heck I probably wouldn't notice any differences really and I am not sure that I wouldbe totally comfortable on a true track bike on the street.

Someone correct me if I am wrong here, but isn't the Surly Steamroller a little bit on the relaxed side with it's geometry, thus making it a comfortable city rider. Those bikes seem to be hugely popular, even if they are a house brand for QBP.

Tires. Please let me run some wide tires on there! Here in the city it is much better to run a little bit wider tire, it just seems a bit more comfortable. Not really looking for extreme here, but I normally run 700x28's with a set of full fenders. That is another thing, if it really is for an urban assault bike then make it so that there is the option for fenders, the little eyelets on the forks.

Just my 2 cents, whether any of it makes any sense, who knows..thanks.