BT coaches provide feedback using BT logs?

You can look here:  http://www.beginnertriathlete.com/cms/article-detail.asp?articleid=1088

But there are no "BT approved" coaches.  There are simply coaches who have set themselves up to use the features BT offers.  You may find another coach who is willing to check on your BT logs even if they are not listed there, although many have their preferred methods of communication already established (could involve other logging systems, e-mail, phone, etc.)  Personally, the use of the BT logs by the coach might be a nice added plus for me, but would not a critical item in my selection of a coach (were I to use one).