Jackson Documentation
General
Jackson Tutorial: the best place to start; covers basic processing approaches and covers common usage patterns.
Jackson FAQ covers many common questions regarding typical usage.
Jackson JavaDocs has extensive and detailed coverage of all the features: what is available, where, how. But you do need to know where to look.
Features, general
To learn more about how to configure Jackson, check out:
(New) Features by Release
New functionality is being introduced with new releases, and sometimes it is useful to know what is the minimum version that has specific set of functionality you need; or to evaluate whether upgrade to a new version would make sense. To help with this, there are separate release pages for recent (and sometimes upcoming) Jackon releases:
1.1 Features (Jun 2009)
1.2 Features (Aug 2009)
1.3 Features (Oct 2009)
1.4 Features (Dec 2009)
Planned 1.5 Features (work in progress)
How-tos, samples
How-to Ignore Unknown properties in JSON content?
Sample code for other use cases
Best Practices
Forward-looking
TODO list
Known Issues (higher level ones: for bugs and feature requests, check out Jackson Jira at Codehaus)
External docs
General:
Jackson with frameworks:
"Using JSON bindings with iBeans" (iBeans/Mule)
Jackson extension for Restlet (Restlet)
Performance:
Performance comparison of Protocol Buffers, JSON et al formats, libs.
Basic JSON parsing performance in Java (Cowtowncoder.com)
JSON data binding performance with 3 JSON data binding libs: Jackson, Google-gson, Json-lib (Cowtowncoder.com)