Impostah is a new WebOS Internals service and application, which gives you full access to your data stored on your device.
It is only available for webOS 2.0 and later (the concept makes no sense for webOS 1.4.5 or earlier).
It's mainly for our internal use at the moment, as we explore what's in all the new webOS 2.0 databases, activities and services. But we figured someone else might find it useful too, so we've released it into the testing feed.
Impostah is also able to provide Global Paid App Catalog Access for new unlocked GSM Pre 2 devices - the details for that are in a different thread. Any questions or discussion about that procedure should occur in that thread, not this one.
The long term plan for the app is to provide a user-controlled (with explicit informed user consent) way to manage the access permissions of homebrew apps to services, databases, and other pieces of information on the device.
The concept of bypassing default security measures under the control of the user is a powerful one, but also a dangerous one. Rest assured that we are fully cognisant of the pitfalls that unsecured access to a service like this would create, and are architecting the service to exclude those problems (or at least make them under the direct informed control of the user).