Playbill.com is a great resource in general, but they have a couple of specific sections that I wanted to call attention to:
Ask Playbill.com is a weekly column that answers questions about theatre.
Casting and Jobs: Job Listings is a job database for job-seekers.
Here are links to some articles that address some aspects of music directing:
Question: Can you talk a little bit about the music department of a musical? What happens to a musical score once it is written by the composer? How many people get involved (i.e. orchestrator, musical director, arranger, etc.) and how important is each position? Can you compare today's practices with the way they were done in the "Golden Age" of Broadway (50s and 60s)? Can you also talk about what happens when a show is revived and how that show's score is dealt with?
Answered by: Seymour "Red" Press, musical coordinator of Passing Strange and the current revival of Gypsy.
Question: Regarding the artistic staff of a Broadway musical, what exactly does a vocal arranger do? If a vocal arranger writes harmonies for the songs in the score, why doesn't the show's composer write them?
Answer: Carmel Dean, the 28-year-old vocal arranger on The 25th Annual Putnam County Spelling Bee.
Question: What does a dance arranger do?
Answer: David Chase, the dance arranger for the current Broadway shows Cry-Baby, Curtains and The Little Mermaid.
Question: What makes an Equity rehearsal different than a typical community theatre rehearsal?
Question: How long is the rehearsal process for musicals before their opening night, and how often does a cast rehearse after a show opens, if at all?
Question: What are the attendance rules for professional performers during the rehearsal process? How much notice must they give for a conflict and does the union provide for a certain number of absences?
Question: "Could you tell me what is the exact role of a swing in a show?"