Santorum went clean in January and cancelled his biweekly sit down with lobbyists. If, that is, "cancelled" means "changed rooms". Kevin Drum has the link to the WaPo article:
....But in the month since his announcement, Santorum has held two meetings attended by the same core group of lobbyists...convened at the same time as the previous meetings....Instead of being held in the Capitol, however, the recent meetings were conducted nearby. The first was held about three blocks away, at the headquarters of the National Republican Senatorial Committee, and the second was held around the corner from that building, at the Heritage Foundation.
Santorum sure spreads a slimy trail...(or, so I've heard)