Architecture, glass buildings to be excact.

Scenario:
An old friend has just found me on facebook and asked if I can shoot some pictures for the company she works for. They are in the glass industry and want me to shoot some of the buildings in London they are involved in.

I've agreed a low call out price, then a fee should they like the pictures. So that's sorted.

I'm thinking my 10-22 will be my most used weapon of choice, then my 70-200 or 85 f/1.8 for closer detailed images.

Now the questions.

Is a CP filter going to be essential for my UWA?
I presume, that like in landscape you want to get to a location for sunrise and sunset for the best colours etc.

Anybody have any good architecture tutorials bookmarked?

Yes/no/maybe? Look through it. See what you get.

If you can draw a horizontal line from the camera to the front of the building, and put the center focus point on that spot, the camera should be level, which will eliminate most distortion. Problem: Sometimes that means that the top of the building will be cut off.
Use the wide focal length to shoot the horizontal building with the cam rotated vertical so the building just takes up the top half of the frame. This keeps the front of the lens (and the sensor in the cam) more parallel to the vertical of the building, which should eliminate most of the perspective distortion, too.

Some links in this thread:
DOF for Architecture