Free profile. Upload videos (demo reels, whatever) or embed your YouTube stuff. Upload headshots, photos, resume, links. You also get an email address and a website url direct to your profile - all free. Discussion boards, search engine so you can find people in the blink of an eye. Tired of posting on boards for anonymous cast or crew? This can grow to be KC's resource for all aspects of cast, crew, writers, producers, and anyone involved in any aspect or theatre, film, tv, radio - and performing art (and science)

Perhaps the best way to put it is from a blog from a company I did some extra work for:

"Post to Craigslist and hope some half-way decent folks respond, and then hope that half of those half-way decent folks show up and know how to hold a boom-pole. Until you have a network, your only options are to gamble or to simply not play the game at all."
Italics mine. The whole blog is at:
Hard to Port. Loose All Sails.

Also: Learn more on the "From The Admin" discussion.