The latest version of Banshee can be downloaded from Softpedia
Banshee, an open source multimedia solution to playing music, videos, podcasts, and Internet radio, is now at version 2.9.0.Banshee 2.9.0 is the first major release in ages, but it's not a stable one. That doesn't mean that you shouldn't install and test it.
“Banshee 2.9.0 is the culmination of twelve months' work by 19 developers, 27 translators and dozens of bug reporters and testers. It is a development release, the first of the 2.9.x releases leading up to our future stable release Banshee 3.0,” reads the official announcement.
This is the also the first release based on GTK3, which is quite a development leap for Banshee. A complete changelog can be found in the announcement. Download Banshee 2.9.0 right now from Softpedia.
Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.