Skype, now owned by Microsoft, has announced that it will acquire GroupMe, a 16-month old group messaging startup for $85 million. There are no public statements on the price of the deal, but AllThingsD has come up with the figure referring to sources close to the negotiations. The startup was founded based on work done in a hackathon at TechCrunch Disrupt in New York in May 2010. During the 16 months of its existence, GroupMe has raised $850 000 in seed financing and later $10.6 million in venture financing. Needless to say, the payout for the investment in such a short time period is fantastic.