Facebook just activated the redesign.  If you don't see it, it should automatically switch over for most users by tomorrow or you can go to new.facebook.com.
The new profile page is simplified with an integrated "wall" and tabs for applications.  So far, I like the new user interface.  The changes bring some standardization to pages so it's much easier to navigate and profiles load quickly regardless of how many apps a user has.  Check it out.