Athearn released their manuals today, 6/24/2009 on the Athearn News that you can download their manuals for the Soundtraxx.
http://www.athearn.com/Dcc/
Athearn Announces the availability of the manuals for their Tsunami Sound units.
Related threads:
http://cs.trains.com/trccs/forums/p/152872/1691043.aspx#1691043
http://cs.trains.com/trccs/forums/p/153603/1697802.aspx
EDIT: - Major changes to make it the lead in the thread.
The Athearn communication announced the three manuals for the Tsuami is available. The news was about 8 hours old. Sorry you had already known all about this but there might be someone that had not seen it.
CZ