Last Thursday Facebook announced a major step in their growth strategy. It is now possible for others (both companies and Facebook-users) to build so-called applications that can be integrated in your Facebook profile. this is way more than just making widgets possible. Facebook now gives API access to their core functionality, like replacing their well used own photo-functionality with your own.

Twitter in Facebook
Immediately a wave of applications has become available. Some like Twitter, in cooperation between Facebook and the third party, others like Flickr, are made by some student with a Facebook profile.
I added applications for Last.fm, Flickr, my presence in other YASNs, Twitter, Radar and one for developers. I hope for the quick availability of apps for Plazes, Jaiku and Skype.
I think this step is interesting in a couple of ways. First the degree of openness (where MySpaces clumsy handling of widgets pales in comparison), but also for platforms that position themselves as ‘ open’ such as PeopleAggregator and Ning where you can start your own network, this is good news.
I see this as a sign that openness and the ability to migrate your network across platforms now can become part of the competing elements in the YASN field. If you love somebody, set them free, now stands a change to become true for YASNs a bit more. Keeping your customers by acknowledging they do not want to be imprisoned by your product.

Flickr and the YASN application
Compare this to the weird strategy Ecademy had, making their free functionality next to useless, and making it impossible to even delete your account.
I think Facebook made a great step, that also brings value to the student communities that made Facebook big. With that the criticism Facebook reaped when opening up to all last September, amongst others from Danah Boyd, that opening Facebook would mean the end is answered too. Also for the ‘ab origine’ community in Facebook new value has been added.

Apps you add are also mentioned to your contacts, making quick adoption of apps possible.