4Chan today announced an impressive new milestone — to date the site has seen a total of one billion posts. The achievement was reached yesterday, though 4Chan points out that it's not quite sure which post was actually the billionth. The news also comes not long after the site announced some other impressive usage figures. Based on stats from Google Analytics, between June 4th and July 4th of this year the site had more than 22 million unique visitors and 620 million page views — and those users are posting more than one million times each day, which is just further proof that memes have indeed gone mainstream.