hhmm, great question. I would be interested in finding out...

Nothing fancy, just honesty.

I think you can find numbers to studios pretty easily in other places. It depends who you are trying to reach. Assuming you want more than just studio phone numbers, an online membership to the Hollywood Creative Directory may serve your purpose... And if you are seeking talent, you may want to check out: www.whorepresents.com

Hope this helps a little.

Go here: www.filmmakingstuff.com

If you're serious about making & selling films, I definitely think it's worth paying for PRO IMDB membership - just to see the business details of particular films /companies.

Another good film business one is Cinando (www.cinando.com) - this is fantastic for finding out the contact details of all sales agents / buyers / production companies - particularly good for seeing who is going to the Cannes / Berlin film markets.

Alto Films Film-making Workshops - Brighton -Visit: http://www.altofilms.com/workshops.html

I'd been wondering about whether IMDB is worth it. I am always wanting the advanced contact info, but I'm really cheap and don't want to pay the monthly fee. It might be time to suck it up and pay for the service. If I find I need it 3 or 4 times a month that would probably be worth the fee.

I've found it extremely useful in working with SAG. Their information is far more useful (yikes) than what SAG has on their site.

I use IMDBpro and have for the last two years. I'm an actor as well as a filmmaker. I use the pro version a lot when doing research on either people or talent agencies. But you can find information on studios at their own websites.

Filmmakers, resources, and equipment for barter.
http://www.hollywoodgreenbook.com
Practical Networking for the Entertainment Industry. Free!

I used it for about 1 year and tbh, found it a waste of money. But really depends what you are using it for. Just noticed this post is ten years old haha, but still relevant.