Welcome to the M-L, I'm not sure that there's much interest in CD's since this forum focuses on movies, but Hey!!!, I'm game for some new content.
I assume that you mainly focus on the US "majors" and not on the ever growing list of specialty retailers as with Twilight Time, Code Red, Scorpion Releasing, Severin, etc....

There was a similar blog which recently disappeared, it was run by a girl which listed the exclusives, difference was that she posted them as soon as the placeholders, or the pre-orders were up, found that useful actually.

Again, welcome and post away......