Lightweight music player

Is there any ultra lightweight music player for Ubuntu (like foobar)?

Preferably with Unity taskbar integration.

Audacious is integrated in Lubuntu by default, because of its light-weightedness. You can try it: sudo apt-get install audacious. It supports two different layouts: a GTK-interface, and a Winamp-like interface, from which the latter can be skinned. It doesn't support Unity Sound Menu integration.

Above: the GTK-interface

Above: the Winamp-like interface

My favorite Foobar2000 substitute is gmusicbrowser: "An open-source jukebox for large collections of mp3/ogg/flac/mpc/ape files, written in perl."

I'm not sure how lightweight it is, but it has one feature which made me fall in love with FooBar2000: multiple entries per tag! That is, you can tag your duets with two artist names and have only "Artist A" and "Artist B" in you set of artist instead of also "Artist A feat. Artist B". The same goes for genres etc. Wonderful for large music collections! Highly recommended!