Download of @AppStore 1.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac application is a product of Onemac.net.
From the developer:
Now you can follow the official Mac App Store tweet right from your Mac OS X Dashboard. Get hot app news, brand new releases, top featured apps, exclusive offers, updates, upgrades and much much more.
You may want to check out more Mac applications, such as Daylight, List My Apps or SimpleMind, which might be related to @AppStore.