On Friday, Dec 16th, WebSphere Cast Iron Fix pack 3 was released. This fix pack, brings about a lot of improvements and is very much recommended to migrate to. You can refer to the announcement doc here and click on the downloads link to grab your form-factor's image.
The Social Experience
From archive: December 2011 X
The wait is over. The much sought after Getting Started with IBM WebSphere Cast Iron Cloud Integration is now available in draft. You can download it for free, and send any feedback in two weeks time, after which the final draft will be published. As with any other Redbook, it is rich w/ technical aspects of the product, and helps you better understand the product. 3 detailed scenarios are considered as well.