I am from Austin area and recently went through N-400 process. My timeline is as follows.
Application sent: Oct 2005
Fingerprint: Nov 2005
Interview: Feb 2006
Oath: March 2006
At the oath ceremony I spoke with a few people and at least one of them mentioned he sent in his application sometime in November 2005. I had to go to San Antonio for fingerprinting, interview and oath ceremony. All in all it took about 4 and 1/2 month for the entire process.
Hope this helps.
Regards,