The speech.scp and trigger scripts will be useless to you. They will no longer be supported at all. However, the documentation was released weeks in advance so that you can familiarize yourself with the system, and begin the transition. Most triggers will be almost trivial to replace. Over the coming weeks up to release, more and more documentation will become available to help you understand how it fits in, and how to translate between the two.
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/uox3/uox3_new/documentation/jsengine/ or http://www.uox3.org/jsdocs/index.html"
You'll find example scripts both packaged with UOX3, as well as in the JSE Development forum at UOX3dev.net.
You can post any ideas you have on the feature request page at the UOX3 sourceforge page. Also, the forums at www.uox3.org are regularly read and reviewed.