I think the May (and even June) primaries are being held, but they seem to be purely symbolic. I feel bad for the states that are spending millions to hold them, and for the voters, who clearly realize that their votes count for nothing now.
Ron Paul is apparently running a stealth campaign to capture the actual role of delegates in various states. They’ve had good success and are discussing “abstaining” from the initial vote. It be a miracle, but it would be a miracle if the Pauliacs managed to keep Mitt from reaching the 1,144 votes.