I feel you man, I had a phone interview for an IT job in VA.  It was for the county school district, I think it would well.  The IT director returned my follow up call and let me know he had my resume and we started chatting mainly about how I am in Florida and want to relocate to VA b/c my parents and uncles moved there.  Then he started asking some basic tech questions and before I knew he said he wasn't planning on doing interviews until Monday but you just did the entire interview.  I liked it this way because it wasnt a planned interview so I wasn't nervous or anything.  BTW I am only 22 and only have 2 serious jobs, one from when I was 18-21 and the one I am currently working, so I havnt had many interviews unless you count the basic highschool jobs.
The 2 things im concerned about is that I live in FL and he may take a local less qualified person over me, and that I have no certifications.  The simple fact is I am just good at what I do when it comes to technological related issues, and sorry if that sounds cocky.
anyways good luck