Don't know for sure, but I always use www.myhound.com
for finding releases my favorite artists and actors.
You can sign up (for free) and will get a free email alert once the release date is known.
Here is the Jeff Speakman site:http://www.myhound.com/saluki/name/58557?src=w15
Works for all kind of genres by the way, so authors, bands, etc.