I was looking up some stuff on IBDb, and it appears they've re-done their actor/actress pages. It now tells you what role they played/understudied, and whether or not they were a replacement or not, right on the bio page. No more searching through the replacements list!
"Winning a Tony this year is like winning Best Attendance in third grade: no one will care but the winner and their mom."
-Kad
"I have also met him in person, and I find him to be quite funny actually. Arrogant and often misinformed, but still funny."
-bjh2114 (on Michael Riedel)