I just tried Sideloading some Android apps on my Z10..... works reasonably well.
So far Chrome, Google Maps and some Android games. Unfortunately, it won't work with the ones that demand an update or download from the start, but there's a lot of trial and error. Some work, most don't.
http://crackberry.com/how-put-android-apps-your-blackberry-10-device got me started.
There's a link in there somewhere that brings you to a APK to BAR converter.... but I'm still trying to find which apps I want to convert and which will work. Netflix sort of works, it's just really laggy and takes forever to load. But some standard games (Angry Birds, Cut The Rope, Canabalt, Emulators) do work fine.
Give this method a try, works for NEARLY all apps and it's actually pretty simple and quick to do once you've done it a time or two
http://forums.crackberry.com/androi...un-any-android-2-3-3-app-blackberry10-817781/