I like the overall look, I think you may have too many colours going on though .. you should think about trimming it down a bit.
Also on your "About Us" page, the single bio makes it look like you're running a one-man show. If you are, don't put a bio up.. because people don't want to trust their printing job to just one guy. If you do have other staff, put some info about them on there as well, it helps to build trust and makes people feel like they are familiar with your company before they call.
Also I looked at your "Start Your Order" page and I have to say that you're being a little "reckless" by doing design work without taking a deposit. What's to stop someone taking your design to another company without paying you a cent? It does happen.
I would change to a system something along the lines of:
Quote given, changed if necessary. If they have their own graphics, take a look before giving the proof. If you are doing graphic work for them, you should estimate based on the description and charge X amt per hour.
Quote accepted, signed for (via fax) and credit card charged for deposit. IF the quote ends up being more than you originally quoted because of changes to qty or extra design work, you simply need to inform the customer before you continue with the changes.
Design created, proof made. If they keep making changes and do multiple proofs, you need to start charging for proofs.
Proof approved by customer (via email or fax only.. not verbal) and no changes after this point.
Production begins on order.
Production finished, shipping cost added to order, and final amt charged to CC before shipping.
Now this system might seem a bit harsh to you, compared to your current system, but it is fair to both you and the customer. Right now your system is unbalanced and too much in favor of the customer, which means you will lose money on jobs. You will also end up with very frustrated employees because the system creates more stress and burden on them (they can't say "no" to demanding customers or people who monopolize their time).
The system I described above was used at my old job (at a sign company, very similar production process to screen printing) and it worked great, the company was extremely successful and almost all the jobs were from repeat customers, and the customers always got great service. Sometimes giving good customer service means setting parameters and rules, rather than letting people get whatever they want and losing money (and going out of business!) because you were too flexible.