Add support for streams: http://blog.perforce.com/blog/?p=4386
Pre and post build automatic merging is also being requested:
"Plugin should support merging streams before the build. That is, it should be possible to configure which stream to build and configure also other streams for the job. Changes in any of the streams should trigger a build. It should be possible to merge other streams (or the first stream that has changes) to the stream that is going to be built. Resolve options for the merge should be configurable."
"It should be possible to merge streams after the (successful) build. This could be either "p4 merge" or "p4 copy" operation. Resolve options should be configurable. Pending changelists should be submitted. This way the CI build can be used to gate code changes and move code between codelines."