Probably very old news for all you screenwriters out there - but I've just stumbled across it.
www.scriptshadow.blogspot.com
It's a blog that discusses [and posts links to] screenplays that have recently been bought as specs - yet to be made.
It's all pretty Hollywood - having said that they've just reviewed Brit List screenplay "Grabbers".
A good resource for getting a feel for what's being bought - plus interesting to see what changes when/if it's made.