Just renewed my www.residentswap.com subscription and checked the aamc's "find a resident" page. Nothing for PGY-1 FM.
It's going to take a little while for the dust to settle. Definitely check frequently, but don't expect anything to show up immediately. There are always a few matched residents who have to drop out because they ended up not passing Step 2 CS or CK in order to graduate on time and can't get another exam scheduled in time to have results by July 1st. A few have a change of heart about specialty and apply to NRMP for a waiver. A few are IMGs whose visas are delayed beyond the point their program is willing to wait. Once that happens, programs will post the positions and be flooded with applications. You'll want to be an early responder, so be prepared with a pdf of your ERAS application, updated CV, USMLE scores, medical school transcript and diploma, MSPE, and letters of recommendation if you can get them. At the very least, let your letter writers know your status and see if they will agree to send the letters if requested.