Apple has privately released iTunes 10.5.1 to its developer community, allowing them to test the forthcoming iTunes Match service.



From Apple Insider:

The final release of iTunes 10.5, released earlier Tuesday, does not include support for the $24.99-per-year iTunes Match service. It will become publicly available later this month, along with another update to iTunes.

Developers can test the iTunes Match service with the first beta of iTunes 10.5.1, supplied to them by Apple on Tuesday. The beta is available for both Mac and Windows, and iTunes Match is currently available only to developers in the U.S.

  Apple issues iTunes 10.5.1 beta 1 to developers to test iTunes Match