I just did a major restructuring of the forums, and moved most of the posts to the relevant forum. For new posts please use the relevant forum, or at least the most relevant if you don't find the exact one.
There is an openocd (open source project) support for the plug. The connectivity is simply using the same usb cable. I haven't seen a wiki explaining how; but I know people have already tried it (timtim on #openplug IRC channel at freenode).