Marine Grunt,
I have never heard of this being done from the air force side. Most of us decide to come to the dark side, not the other way around. I suppose if you really wanted to do such it could be done. When I was at TBS in the early 90's there were several winged 1st Lt's in our company. They were all navy guys who had been given the choice to be a black shoe or go fly in the Marines. The RIF of the early 90's was not a good place be in. They decided flying in the Corps might not be such a bad thing. They got to come over and skip OCS but still had to endure TBS. They were still happy because they all got to fly tactical aircraft instead of P-3's and S-3's which were being cut down. Be advised, the Marine Corps does not take inter service transfers like the Guard/Res. You would probably have to start all over again, including losing any rank you had prior. I could be wrong, but you should ask an OSO. Even he would probably have to make a few calls to HQMC.