checked here http://community.invisionpower.com/4docs/advanced-usage/development/ but couldn't find a documentation on creating an application.

Am I missing a guide on another place or?

anyone please?

No such guide was released yet. But so far I know Mark is working on that.

@Mark please correct me if I am wrong.

No, you're not missing anything. More is on the way. If you need to start anyway, though, enable developer mode, then go to applications, create your app, then options > developer center.

Thanks, will give it a try then!