We covered Cloudier 2 weeks ago, not sure when it was to become available to users. However the app has just been released on to the app store.
And as expected in the concept video, the app is awesome. It's made specifically for CloudApp users, of which there are many. The file sharing service has been very popular among Mac users and continues to be. I use it myself because of how quickly I can share files.
The problem was that iOS never had an app which lived to up to the slick and quick service that CloudApp gives. CloudierApp now does.