I was just reading old posts under the thread about "Books and other resources for MT Students" and saw a link to the most fabulous resources -- take a look at:
Theatre Directories - Summer Theatres - Regional Theatres - Theatre Training Programs
One of the books they publish is the "Summer Theatre Directory, a directory of opportunities at over 350 Summer Theatres, Theme Parks, Summer Training Programs." They have a link where you can pre-order the 2008 edition, or the 2007 edition is currently available.
They also publish the "Regional Theatre Directory 2007 - 2008: Profiles of over 400 theatres, and an employment guide to regional theatre."
And finally, the "Directory of Theatre Training Programs: College, Conservatory, University programs, Graduate & Undergraduate degrees, Admissions & Financial information." That one looks great for researching college MT programs, and was highly recommended by several people some time back on this board.
Don't we love it when we find that someone's already compiled all the info we're looking for?! Yea!