Thank you for clarifying. Currently my client doesn't have a need for more than two interfaces, but having the capability to add dmz functionality in the future was a big selling point.

Interesting. I just purchased a PIX 506e for a client based on my understanding that it could support VLANs, but according to the document above it doesn't support logical interfaces. According to the data sheet for the 506e it does. If it doesn't...

According to your show statements above. When configured via dhcp your default gateway is 192.168.1.2. As others have mentioned, when you change your outside interface to be static, you need to add a default route. Below is the command you'll need...