This is great news, for anybody who doesn't know Taringa, they are huge in Latin America, specially in Mexico and Argentina.
In the case of Argentina, to give this exposure to Bitcoin, in a economy that suffers a 40% anual inflation, currency controls (no free markets and several exchange rates for the devaluated local currency) and where most of the population don't have bank accounts, it's great news.
I'm still not sure how it will be implemented but it will definitely help in introducing Bitcoin into new users.
I'd prefer to address Warrior B's very important, and accurate statement vs. splitting hairs on the terminology of "users", but I will address both. This integration is huge because, regardless of the english speaking/european world's unfamiliarity with Taringa! it is a massively popular site, that ranks #16 in Argentina (the sites between 1-15, you've heard of everyone, and most are variants of widely popular sites like Google.com.ar vs. Google.com, Yahoo.com.ar, Amazon, etc.). More importantly, it's users live in countries, like Argentina, that suffer economic depressions regularly, and currently has 40% inflation. The countries that need bitcoin most. The average person here has no idea what it's like to live in a country with currency controls, hyper-inflation, poor financial services. Try paying your rent, in cash, where the largest bill is only worth about $8USD. Bitcoin solves many of the issues Argentines experience day to day, so from a mass adoption strategy, this partnership is huge, and the single largest introduction of bitcoin to a social platform yet.In the case of Argentina, to give this exposure to Bitcoin, in a economy that suffers a 40% anual inflation, currency controls (no free markets and several exchange rates for the devaluated local currency) and where most of the population don't have bank accounts, it's great news.
I'm still not sure how it will be implemented but it will definitely help in introducing Bitcoin into new users.
Taringa! has 75 million unique visitors to the site. 27 million are registered users. I would often visit, and read Reddit, for example, long before I became a registered user, and most would accept, that I was a user of the site. There are currently 200k users browsing the site as we speak (some registered, some not).
Exactly
and about 300 000 of them are active every day. 
