Pubsub: Howto subscribe and publish content?

Hi *,

I want to develop a small app which is able to subscribe to pubsub-nodes and publish content to them.

Thanks to this thread: i was already able to create Nodes on my Wildfire server.

I am using the su-smack-extension.

But now I have some problems to subscribe users to this node and publish content.

How do I do this?