Robin Good's insight:
CapturetoCloud is a web-based app that allows anyone to capture, collect and organize into collections any type of image, PDF, web page or Google doc that can be found online.
CapturetoCloud offers the option to keep collections "private", and to invite any number of people to collaborate and contribute to any specific collection.
Free version available (limited to capturing 200 items and having three collections).
Read a full review about CapturetoCloud: http://www.ilovefreesoftware.com/15/webware/free-online-collaboration-tool-to-collaborate-on-a-task-together.html
Plans and pricing: http://capturetocloud.com/plans-pricing/
Video tutorials: http://capturetocloud.com/products/videos/
More info: http://capturetocloud.com/