Atlassian last week announced end of support for Announcement , which to me is a suicide on the enterprise end. Discontinuing support for Enterprise grade Java severs like Websphere, Weblogic and JBoss and only supporting tomcat is not going to take them a long way within the enterprise environment. I can understand that it’s heavy on their development and support costs, but then the simple solution would have been to provide two versions of the product, one standard, which only has support for tomcat, and other enterprise, which supports all things enterprise including IE 6. The difference in cost could then be used to support the enterprise grade features.
I think Atlassian needs to seriously consider this announcement otherwise they run the risk of being excluded from being considered an enterprise grade wiki.