A good start.
Sending the customer pics of the build process is a great idea.
They get to see what is going on and feel part of it. Some folk could not care less, some love it, if they feel good that cant hurt.
Also gives them less chance to say 'Dont like that' when you have finished.
Also they might come back for more.
I always offer to throw in a CD rom with photos of the build, again some love it some could not care less. Takes 10 minutes to do and costs about 50p.
Just a few thoughts, Chunko'.