Docstoc, a startup aiming to be the YouTube for professional documents, is giving away 1,000 invitations to its private beta to TechCrunch readers.

Redeem your invitation by going here and entering “TC40″ into the “invitation ID” field. The first 1,000 readers to do so will get in; dawdlers will need to request an invitation using the form on Docstoc’s homepage.

CEO Jason Nazar says that there are currently thousands of free legal and business documents on the site. The company recently raised a round of financing and presented at the TechCrunch40 conference during Session 4: Crowd Sourcing.

Check out a four-minute-long tutorial of Docstoc below.