The acquisition raises some questions about the ultimate fate of the Posterous blogging service. The nature of Twitter's statement suggests that acquisition was undertaken to obtain talent and technology—it's not clear if Twitter is interested in integrating the actual Posterous product into its own microblogging service.
Twitter says Posterous Spaces will continue to operate without disruption, but the company hasn't indicated whether the service will still be actively developed going forward. Twitter has promised to notify users in advance before making significant changes. The company also promised to provide instructions to help users migrate to other blogs and services. Posterous published a short FAQ and a statement, both of which echo the specifics provided in Twitter's announcement.
Posterous, which launched in 2008, aimed to make blogging easier and more accessible by providing a very simple platform for authoring and sharing content on the Web. Support for publishing new posts via e-mail helped Posterous attract a loyal following, but the service never managed to achieve the same popularity as Tumblr, its chief rival.