Main problems are that headphones jack in not working (not muting speakers) and microphone is not working.
You can fix this problems by installing latest Alsa Drivers Modules.
sudo apt-get install ghex
Plank is lightweight dock application for Linux. It is created by Docky team and it will be default Dock in Elementary OS Luna.
Adobe has released Beta 1 for Flash Player 11. This version don't brings new things compare to Windows version.