Froyo Update Un-does Rooting?

Yes, it un-roots your phone: it replaces the files on your phone that tell it you have root permissions.

All you have to do is root it again.
 
Depending on what modifications you've done since rooting, the update may not even work OTA. But yes, it will remove the superuser, busybox, and rage files required for root access.
 
I was rooted, no changes except de-Binged... Installed the update and Superuser is still their... Titanium Backup and Root Explorier still work... Am I still rooted or not??