Yes! BlogTalkRadio has just released a new Premium Feature that allows you to get all of your most important metrics and performance reports for your shows. Simply login, go to My Account, and on the right hand side, under the My Account grouping, you'll see a link for "View Show Reports".
You can export any of these reports into Excel or cvs. and for more information on each area of the report, click "See Full Report"
Hosts can of course still get their per-episode listener numbers by going to My Account/Schedule-Edit a Show/and then Archives. Next to each episode is the current listener numbers for live, archive and callers.