I've had Google Sketchup for quite a while now, and while I'm no expert, it's definitely better than most other programs I've used to try my hand at modeling. I must warn you, I'm not very skillful at Sketchup either, but I still find it fun to dink around in it every once in a while, creating small portions of larger cities that I will refer to as neighborhoods out of convenience.
The neighborhood I'm showing you today is my most recent one, though it is now unusable due to a height bug where the parameters are all set 30 feet off. No matter, for I can always build anew. Today's neighborhood is called Merriam, and I made it mostly to test a few new concepts such as the depth tool and using components. (if you've ever used Sketchup you'll know what I mean.)
So, without further ado, here is a general overview of Merriam: (once again, click for full-size images)

It's not too friggin fabulous, I know, but it's fun. As you can see, I have labeled the office tower (mainly for scale), the bus station (to test components), and the sunken highway tunnel.
Here's a closeup of the tower...if you can call it a tower. 8 floors is about the height of an average water tower, no?

Now to the bus stop. As you can see, there is a nice seating area bordering the bus lane. These benches are all components either made by me or downloaded from the Google 3D Warehouse (clicky). The tunnels are clearly visible in the background.

Here's a general overview of the sunken highway tunnel. It actually turned out pretty well in my opinion. The only thing I'd like to change about it (and probably the whole program in general) is add many, many more texture options. My favorite part of this complex is the pedestrian walkway on the highway divider.

Finally, a closeup of the pedestrian walkway...

Enjoy, mates! Please comment and tell me what you like/dislike, etc., and what you think of the general format.