I wrote quite a bit on App.net recently here on the blog and the service is getting more and more attractive. With these droppings in price it is even easier to join and give it a try.
Of course also Tent.is has gone public now and it does look interesting as well. Not sure what to think about that but I might get me an account there as well. In the meanwhile you can of course follow me over @svenseebeck on App.net.