The latest version of ADO Programmer's Reference is now available. The ADO Prog Ref started life on 2.0, way back when I started writing full time, and I still believe it's the most comprehensive reference to ADO available.
So what's new? Well to be honest, not that much. The latest ADO version is really just a security update, adding restrictions to some potentially dangersous operations - accessing data from remote locations for example. It's also now with APress, so has the big advantage of not having a big ugly picture of big ugly me on the front.