I was going to create a topic about it, but it seems i'm late, wich is good :D, since its launch is today.
Also, the more people using Construct2, the more tutorials, games, demos and learning materials to be made for the engine =], and that would really benefit us all.
I hope Scirra can make its way towards Steam, and we buyers of Construct2 can get an acess to its key in Steam too xD