I want to replace a couple of sites i have with wordpress based sites. 1 is a Vbulletin and the other is a CSS site. I would like to set up the wordpress site and be able to switch back and forth while working on the new set up. So i want to keep the ULR as I do this. I know I can put the new site in another directory or subdirectory but i am wondering what would be the best approach to keep the ULR the same for book marks and SEO indexes. Maybe I am over thinking this and a simple redirect would work that i could turn on and off as I work on the new and old setup. I do not want to lose traffic as I do this. I figured it might pay to ask what others thought about the best way to do this.

Thanks
Wayne