Like many out there, I had a hard time finding a download link for EcuExplorer. Most threads link to http://www.tari.co.za/blog/2008/05/ecuexplorer-v3025/
but it appears that site is no longer in use.
Finally found out that Calvin has moved his downloadables to Google Code along with the source. http://code.google.com/p/ecuexplorer/
For those trying to get ecuExplorer to work w/ an 06 like I was, this thread is helpful: http://www.cobbforums.com/forums/showthread.php?t=36743