the replace box is modal. you can copy something and paste it into the FIND box then, while the replace box is still open, copy something else and paste it into the REPLACE box.
so yes, webuilder beats any other editor out there.
Will
PS. I'm gonna sneak a feature request in here... It'd be cool to be able to stretch or some how set the size of the multiline boxes when dealing with large chunks of code. webuilder 2008 maybe?