The most important changes are:
* The playback backend that allows crossfade and gapless listening.
* The plugin system to easily add new features to Listen.
some new features:
* Partial DAAP support
* Listen Last.fm Station
* Record any stream played in listen
* A 10 Bands Equalizer
* Icecast Agent (to use with a icecast server)
* Visulisazer (all gstreamer visualizer plugin are supported)
* Jamendo Music Store browser
* Crossfade playback engine
* A plugin system to easy write new feature
* Some other (gajim plugin, avant-window-navigator plugin, new lyrics backend)