Here are some of the changes we made since alpha 1:

FEATURES:
* New interface for extracting tags from filenames, now fully working
* Context view applet to view albums (BR 164005)
* Automatic detection of non-UTF-8 charsets for metadata
* Dynamic/Biased playlists improvements
* QtBindings support for the scripts
CHANGES:
* Collection scanner now picks up bmp images too. (BR 167122)
* Update the DBus APIs
* Update the QtScript APIs
* Current track applet added to the Context View on startup
* No more applets flashing between track changes
* Current track applet now shows a message when no track is being played
BUGFIXES:
* Correctly save custom external browser setting (BR 166979)
* Use default KDE crash handler again
* Fix crash when switching tracks in the playlist. (BR 166964)
* Fix crash when trying to download a playlist from unreachable server
* Script Manager now automatically restarts scripts on next startup
* Correctly handle albums with the same name (BR 164173)
* Various bugfixes for the systray tooltip
* In the Wikipedia applet scrolling works properly now
* Context menu separators are no longer shown as empty items
* Make the filebrowser filter instantaneously display results for files
* Add a path separator if required when constructing relative urls from M3U playlists (BR 166346)
* Rescan collection if the version is higher than we currently use (downgrades) (BR 142712)
* Play the first track in the playlist if there is no active track (BR 166336)
* Do not use 100% cpu in the cover manager when changing view modes (BR 164112)
* Fix build on Debian. Patch by David Palacio (BR 166321)
* Fix bug with selection getting stuck in collection browser when selecting multiple items when dragging over them (BR 164960)
* Fix crash when removing collapsed album from the playlist. (BR 163653)
* Mp3tunes would load for users who had never used it before and prompt them with an annoying login box (BR 166332)
* Random album playback mode implemented (BR 164623)
* Fix rendering glitches when double clicking tracks in dynamic mode (BR 166705)
* Make the rating widget on the current track hideable

Development is at full speed and we are trying to get Amarok 2.0 final ready for release soon. If you want to help us now is the perfect time to do so. We need more contributors, especially MacOS and Windows developers. Drop by in #amarok or #rokymotion on freenode. We will appreciate any kind of help from translating, documentation writing through developing and promoting. Come and join us!

Enjoy alpha 2 and watch as the wolf is growing :-)
Please be aware that this is alpha stage software. Bugs and unfinished features are to be expected.
The Amarok 2 FAQ addresses some of the questions you might have about Amarok 2.

Some of the highlights of the new alpha include:

New fascinating look: With the use of vector graphics, artwork looks crispier than ever, while color scheme independence guarantees it'll look gorgeous no matter what.

Innovative user interface: Don't miss several UI innovations like the Plasma powered Context View, new space efficient playlist, and amazing PopUp Dropper! The new Context View allows you to show all the context information you care about. We expect a lot of Plasmoids to be provided by the community in the first months after the release of Amarok 2. PopUp Dropper lets you do different things with your files by simply dragging them to the context view and dropping them on the appropriate area. Append songs to the playlist, copy songs to your local collection, transfer them to your mobile device and edit their tags are just some of the operations PopUp Dropper offers.

Almighty Internet service framework: Seamlessly integrate online music repositories and web services into your musical experience. With online sources like Magnatune, Last.fm, Jamendo, Ampache and MP3tunes you'll be supplied with music 24/7.

Powerful scripting: The new scripting interface is fully based on Qt technology. The APIs are being redesigned, so script authors are asked to wait at least for the first beta release before porting their scripts.

Dynamic and new Biased playlists: Let Amarok choose the music for you. In this alpha you will see the foundations of the new Biased playlists which in the future will let you specify dynamic playlist for any occasion.

Mobile devices support: We are working hard to make sure you'll easily and efficiently access music on your media devices within Amarok, and integrate it with your music collection.

Cross platform: This Alpha release lays the groundwork for a release on all major platforms. Future releases will feature Linux, Windows and MacOS versions.

Don't wait any longer! Grab your copy of Amarok Alpha 1 and help us polish it into a best release so far! Any kind of help is highly appreciated: from patches and bugfixes, through testing and bugreports, to documentation writing, translating and promotion. Oh, and we like artists too! Check out our Jobs page, or drop by in #amarok on Freenode.

Please be aware that this is alpha stage software. Bugs and unfinished features are to be expected. All of the features mentioned above still need work.
The Amarok 2 FAQ addresses some of the questions you might have about Amarok 2.