I use to have fantasies of that situation :-)

Just think of them as extensions of how your own therapist treats you. They don't know you so they can't "hurt" you because they don't know how; they're truly only interested in helping you if they can. Just assume they only know what your T knows and think of you like your T thinks of you, etc. T-clones :-) If you like your T and working with him, then I'd definately go for it (and, even if you're scared, your T can "protect" you from them).

I'd like it too because when you're in the waiting room, etc. if you see one of those T's in the future it will be like you "belong" (as opposed to the other clients that only know their own T). You can get an idea of who works there and what they're like and when your T is on vacation, you can suggest who you'd like as an emergency backup, that kind of thing. I got to be "friends" with another T where mine worked and it was nice just thinking about knowing her when my T was away and imagining her being there even though my T wasn't, gave a little more continuity to my feelings of therapy.