During the last days I was really busy with things like work and studying. So I had no time for the workflow-ng port "rules" for some days. Furthermore I'm going for one week to Ireland, so I won't have time during the next week either. Anyway I plan to get back working on it as soon as I'm back from Ireland. I've already ported the API and overhauled it. I've added support for rule sets and improved things, so that the API is ready for further enhancements like generic scheduling and d6 actions integration. Furthermore I've written simple tests for the API, which will be a great help during further development. As it looks like the rules API improvements take already too much time, so I won't be able to spend as much time as I'd like on the UI of the rules module. So I'll start with a more basic UI leaving the planned ajax/ahah usability improvements open for later. However if you like to help me working on that, contact me!