A few RIM engineers are one deck at the Droidcon event held in Romania. They explained there will be a few restrictions on apps that can run in the Android app player. According to Thing:

Key features which will be unavailable to Android apps running under the compatibility layer on the PlayBook and future BlackBerry devices include Android’s famed battery-sucking Live Wallpaper, SIP and SIP VoIP, anything built using the Native Development Kit, apps containing only App Widgets, and apps containing more than one activity tied to the Launcher.

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In addition, any packages which rely on Google Maps, in-app billing services, Android’s text-to-speech engine, or the cloud-to-device messaging system will all be rendered unusable under the company’s runtime system.

Apps with in-app billing are quickly becoming the status quo, as that’s the best way for full profit potential. Take this news for what you will, but I cannot see there being that many Android apps becoming available given the many restrictions. Nonetheless, the PlayBook will still get a decent bump in app availability with the use of the Android app player. Let us know in the comments if you think this is good or bad news!