Have you finished downloading CyanogenMod's 10.1 RC1 release for your device yet? If not, hit cancel and refresh your browser. Just three days after RC1 started rolling out, CM 10.1 RC2 has hit the download center, going up over night for forty seven devices at the time of writing, including devices from the Galaxy SIII to the Nexus Q.
the list goes on
For those not sure why they should care about CM10.1 RC2, an RC or Release Candidate is basically a firmware release that the CyanogenMod team believes is up to snuff for a daily driver – a new-but-not-bleeding-edge release that's stable enough to rely on.