Pablo, thanks I do develop locally using either MAMP or XAMPP. I probably shouldn't have said dev sandboxes. They will be more like dev presentation boxes. I got DesktopServer recently and it's pretty sweet. I can share out my IP and let clients view the sites, but I can only share one at a time.
I am often working on multiple sites at once and I want to place to upload them to where my clients can see them before we migrate to their live server.
Thanks for the link to the Wordpress codex. That looks like that would work.
What do you do for sharing sites with clients to get them cleaned up before migration and launch?