I think the conservatives are going a little too far on this one (from their point of view).  I have no doubt that this Miers lady is some sort of extremist and that conservatives are going to love her once she starts legislating from the bench and dismantling generations of freedoms won via the courts.

I don't know yet about opposed, I think she needs to be totally and thoroughly vetted by the Senate and hopefully a skeptical Republican caucus will help with that.  That doesn't mean getting access to documents as White House counsel (those are rightly priveleged, most likely; unlike Roberts' solicitor general memos, which absolutely should have been released since he was acting as our lawyer, not the president's).