The Baseball Prospectus Transaction Analysis has R.J. Anderson on the Astros' end of things and Wilson Karaman with in-person reports on the new A's prospects. He's bullish on Nottingham in particular:

When you add up the elements here there's the makings of a realistic 55 Major League catcher and the potential for a true Role 6 if it all comes together. That's a rare bird indeed, and a reflection of Houston's aggressiveness in making a push this year that they were willing to sacrifice him from their system to do it.