Posterous gobbles up fellow Y Combinator alum Slinkset

Posterous, the blogging service that lets you submit entries via email or text message, has acquired Slinkset, a platform for enabling users to vote web content and comments up or down — like on popular social news like Reddit. The deal is interesting because both startups were born out of seed-stage incubator Y Combinator last year.

The buy will allow Posterous to expand into social news aggregation, the company says. But instead of simply presenting news items and links in the order they appear as Google News and most RSS readers do, it will give users the ability to vote for the items that are most relevant or interesting to them, resulting in a crowd-sourced list of the most popular stories and sites.

Earlier this week, Posterous announced an import feature, allowing new users to move the content from their old dead blogs from WordPress, Blogger, or other platforms to their new sites. Based in San Francisco, the company says it sees blogging as being closely tied to social media aggregation and sharing because both are about new content discovery for users. And because Posterous lets users blog via email and text, it lowers the technical barriers to finding exciting new content.

Slinkset’s acquisition should give Posterous an advantage over competitors like Tumblr, Typepad and the like, which have not branched into this area. The company also recently announced support for the iPhone 3GS.

Posterous raised $750,000 in seed round last year from high profile angels including Guy Kawasaki, Mitch Kapor and Aydin Senkut.