Good Omens: First Impression

I haven't gotten to page one yet of Good Omens and I'm already starting to get a little ticklish feeling that I haven't really felt since I finished reading Esther Friesner and Robert Asprin.

On the copyright page, top and center:

CAVEAT Kids! Bringing about Armageddon can be dangerous. Do not attempt it in your own home.

As if that weren't enough, I see in the cedits/rights reserved section:

"BOHEMIAN RHAPSODY" by Freddy Mercury

Sweet god this is going to be an odd odd duck of a book. I'm not quite sure if I should be afraid or very afraid. Oh dear.