Keep in mind that it is of the Facebook shares value, not net worth. 
Although admirable, it is not apart of the Bill and Melinda Gates pledge that many billionaires (notably, Buffet) have taken of giving away half of their new worth before they die.<p>Anyway though, it&#x27;s still a lot. And I hope they follow what other billionaires have been doing; not just throwing it at charities, but putting it into research and even funding entirely new projects.<p>Funding startups and research labs that have no economic goal or an economic return to shareholders is something that is very needed. I see much of the funding coming from this.