I came across a new (to me) blog today via Novum Testamentum called Parableman. It is operated by Jeremy R. Pierce, a doctoral student at Syracuse University. He has a recent post about forthcoming commentaries that is worth a look at. He must have done quite a bit of snooping around to get all of the information. Most of it appears reliable, though there are some errors and omissions — so don’t take it as gospel truth!
For commentaries currently available on the Old Testament/Hebrew Bible, see my OT Commentary Survey.