The P/E ratio is 500. A good ratio is 15. FB is overvalued. As noted in the comments section:
Absolutely excellent caricature of the irrational ebullience over the Facebook IPO. $100 billion dollar valuation for a company with $200 million dollar revenues and first quarter drop in profits of 12%? That's a prodigious premium for intangibles.....buyer beware.....I am one of those investors who think buying the IPO is a smart idea, but after reading this I now know better. Even though Spider Man isn't an Avenger, I hope to one day be able to convey thoughts graphically as well as this artist. The WSJ has an article about the IPO here.
On an unrelated note, the Economist's obituary found on the last page of the magazine is worth the price of subscription.