I thought I'd bring an audiobook review site to everyone's attention. Author Jonathan E Feinstein reviews audiobooks on his blog at
http://jonathanfeinstein.wordpress.com/
I read through several pages of his blog, and realized that he's posting one review each week. Each week! It often takes me a couple of months to finish an audiobook, so I'm impressed at the rate he's been posting. And these are not trivial reviews. He spends quite a bit of time/space reviewing the book itself, highlighting significant points about the plot or the characters. Then he reviews the recording itself.
He seems to have a decent mix of free audiobooks from Librivox and more contemporary recordings, and I found his critique of the volunteer readers at Librivox to be particularly interesting. When he points out a particularly competent reader, it makes me want to look for additional books which that volunteer may have produced.