You can download Angry Birds for Android for FREE! This isn’t the lite version, but the complete full version available for you to download. Just go to http://m.getjar.com/mobile/43600/angry-birds-for-android-os/ on your Android phone and you can directly download it to your phone to install.
To install, you need to allow installation from “Unknown sources”. To do that, go to Settings -> Applications -> Enable “Unknown sources” checkbox. Now you can install it and have fun playing Angry Birds on your Android phone!
Update: You can search for “Angry Birds” on the Android Market to install it from there.