I don't believe Operation Raincheck is still being used anymore.
Might be a local thing; it's still alive and well (fills up quickly, last I saw) here at ZKC in Olathe, Kansas.
In fact, when I inquired about organizing a customized tour for a VATSIM get together (e.g. more time at the enroute sims
), it seemed like they were more than happy to talk about scheduling something.
EDIT: Okay, perhaps not "well"... either I can't search properly, or they haven't announced any upcoming instances of the event.
No argument about them being happy to schedule a tour; NCT was more than happy to let some of us VATSIMers tour the facility as well, just as long as we gave them advanced notice.. KSMF was happy to as well.
But when I tried to schedule a tour under Raincheck back then, the ATM told me that it wasn't being used, nor was it going to come back. Whether it was just for LAS Tower or L30, I don't know, but that's what they had told me..