Well, that was fast. Only four days ago did the social-profile page aggregator about.me open to the public when today, AOL announced it will acquire the startup for an undisclosed sum. AOL officially welcomed about.me to AOL with several tweets.

There is some surprise to the announcement, and then, there isn’t. About.me has been in beta for several months; many social-media savvy entrepreneurs and thought leaders have had an about.me page for awhile, or at least an invite (like your truly). However, the company only went live to the public four days ago. The shocking part isn’t quite the fact about.me was swooped up by AOL in four days, but that the founders so eagerly sold under the option. Perhaps, though, without any venture capital or private backing, the money just looked as good now as a “real” profit would in a year.

The other lack of surprise is that it was AOL buying about.me. AOL has been looking to emerge as the new leader of social media in the last six months or so; their acquisition of TechCrunch and the development of the microblogging community, Patch, along with the purchase of video site 5min, were strong precursors of AOL’s insistence to control the tech and online social game. (One they notably lost last decade.) The acquisition of about.me will not only strengthen AOL’s grasp on social networking, but also provide them a good database of user trends. And perhaps provide a good avenue to generate some profit, too.

It will be interesting to see who swoops up the competitors to about.me, such as flavors.me. These profiles are a great source of social network user trends and data – and big companies, especially competitors of AOL, will want only everything to do with these statistics. For now, though, we will have to watch and see what happens with about.me. Even though tweets from @aboutdotme assure us nothing is changing, we’ve heard that song dozens of times.

Are you using about.me? Will you use it now that AOL owns it?