Opera has released the version 4.2 of Opera Mini for Android, that allows uploading and downloading of files through the browser, and allows pages to be saved for offline viewing. YouTube videos and the like (not all Flash 9+ video sites are supported) are redirected through the system's video player, double tapping the screen now activates zoom, trackball speed issues have been addressed, and text size can now be changed to "extra large" for easier navigation.

More info: Opera Mini