The only way I could see Arlen being allowed to assume the Judiciary chairmanship is if he gets a stern lecturing from W and Frist that he better be a team player or he's off, and is put on probation. Strategically, there may be some plus to having Specter chair Judic. He may be willing to fend off the crazies better than Kyl. Maybe. Pehaps.
W campaigned for him in the primaries then stabbed him a week later saying he wasn't a rubber stamp for the President. You really think he can be trusted ? We here in PA have watched him pull a Brutus too many times to trust him.