Work in more than one location? What is your development environment like?

[eluser]usmc[/eluser]
First off I recommend using Assembla for collaboration in development. It also provides you with your own svn repository etc.

Next I have a dedicated server for production, develop locally and test in a vmware image of my server. Virtual box is a suitable substitute. I deploy with capistrano.

I use a combination of desktop and laptop depending on where I am at and program with a combination of PHPED (for debugging and testing, ssh) and Dreamweaver (simply for the css prompts as I get lazy and forget sometimes).