I received my free upgrade code in roughly 12 hours. I did not complain or worry. It's free. I had been using my new Macbook Air for 5 days straight just fine WITHOUT Mountain Lion, so another day or two wait was not going to kill me. Some people posting here are simply too intense. Wow.
However, I did laugh at the new cloak-and-dagger type authorization from Apple - including password protected PDF for retrieving my valid serial number for Mountain Lion.
Some people are saying they will never buy Apple again or other type threats... Great news! Please leave. Go back to buying PCs or jump on Google's crappy browser OS. I've been using Apple since 1986 (loved my under-performing Apple IIGs) and miss the days when Apple was the underdog.
Elalleqa, Ahoj, Ja ne, Auf Wiedersehen, Arrivederci, Ciao, Adieu, Shalom, Adios, Farvel, Alvida, Do zobaczenia, Tot ziens, Yasou, Anyeonghi Gasyeo, La revedere, zai jian, Ha det bra, Chao, Adijo, and Do svidaniya!
<Edited by Host>