I am strongly interested to use Activiti but i need to be sure of supported database or roadmap if possible. It is possible to know when postgres 9.1 or oracle 11.2 will be supported in activiti ?
As far as I know, Cammunda builds tools around the activiti-engine, using an off-the-shelf engine. All bugs and interesting changes for everyone are contributed back to the activiti project. The fact that we state that oracle 10 is supported, is because ACTIVITI QA-environment is running this server version.
We don't state explicit ally that 11 is compatible, but when Cammunda states this, they have QA for this. On top of that, Alfresco is using activiti and supports 11g as well (and there we have really extensive QA for the stacks): http://www.alfresco.com/services/subscription/supported-platforms/