That looks great! :goodjob:
May I offer some constructive criticism of the city?
I realise, of course, that it's not finished and so you might have already considered these things, but I find that working with interiors it's more difficult to get a 'natural' look to city streets because of the lack of vertex shading - shadows that can be painted on exterior cells to simulate the way light falls on buildings and objects.
Therefore, in order to compensate, you can use clutter and litter to break up the eyeline and make everything look less 'square'. I love the way you have placed your buildings - gives it a very natural, enclosed look. Perhaps outside each of those buildings you could put grass or plants to look like the weeds that normally sprout up outside buildings. Some could have ivy, others fungus or creeping plants.
Nomad made an excellent 'ground cover' resource which is perfect for interior cells. http://i43.photobucket.com/albums/e367/princess_stomper/Pelanor/ScreenShot221.jpg is an example of it being used along with grass and other plants to break up an exterior in an interior cell.
Barrels, crates, urns, bottles ... sometimes I find dropping bits of lichen sparingly around to look like the sort of rotting vegetation you might find in a busy town ... it all helps.
Sorry if I'm teaching my grandmother to svck eggs here (as the saying goes). It's all coming along very nicely, and I look forward to seeing it done.