Well, it certainly didn't take Jim DeMint long to show Mitch McConnell who is really running things in the Senate. Having staked out a very public position against forswearing earmarks, trying to make it look like this would be a "blank check" to Obama, and generally saying that Senate Republicans would never renounce their sacred privilege, McConnell use his opening remarks when the Senate resumed session to totally reverse himself and support the voluntary renouncement of earmarks DeMint had pushed for.
In less than a week, McConnell had to publicly eat his words, without ketchup, and explain how yummy they were.
It is rumored that there is a movement afoot among the first term D senators (class of '06 and '08) to reform privileges such as filibuster and the hold system. They have common cause with the new Rs. Both would like to diminish the power of their elders.