Senator Schumer had on his jovial demeanor as he talked about the Miers nomination at his press conference, which I saw part of just now on C-Span. He indicated that Miers was one of the names on the list of acceptable candidates the Democrats gave to President Bush.
UPDATE: I'm watching the C-Span rerun of Harry Reid's presentation this morning. Miers stood with him and he praised her unstintingly. He didn't commit to voting for her, but he seemed to be actively promoting her.