I was surprised to find out that so many of the Veggie Tales voices were done by Phil Vischer. Bob the Tomato and Mr. Nezzar don't sound like they could be possibly be the same person.
But that pales compared to what I just discovered. Apparently, Elmo and Sam the Eagle are voiced by the same guy. That's a little disturbing, isn't it?
Update: The term 'frell' originates in Farscape, which was executive produced by Brian Henson, son of Jim Henson, creator of the Muppets. I generally prefer 'frak' from Battlestar Galactica, but 'frell' seemed more appropriate given the Muppet connection. It also has a better sound for this form of statement. By the way, catalogues of fictional curse words abound, so if you don't like 'frak' or 'frell' you can choose any of a long list.