The data model is somewhat like YouTube, except the items are not just videos. They can be bookmarks, markdown documents, or presentations (made with markdown also). It’s all built around sharing. It’s easy to share channels with other users, for instance.
Kobble also has extensive support for iOS drag and drop. If you use the multitasking capabilities of the iPad, you can just drag links or text directly into Kobble. The Kobble tree supports drag and drop also. It’s quite efficient at organising information from the web.
Cheers.