The REST web services documentation has been updated.  New sections include:

• How-to section: invoking with Ruby, getting report GUIDs
• Best practices section: connecting asynchronously, compressing data

You can find the documentation from the Developer Site home page, REST API under the Resources area in the upper-right.

We'll be updating the documentation frequently, so please provide your feedback via the Developer Network.  Feel free to comment on this blog post or start a new discussion.