If you can live without some of the features of the Enterprise edition and can stay under 500mb a day in input data volume, you can convert to the perpetual free license.

如果您无需使用企业版的某些功能，并且可将每天的输入资料量保持在500 MB以下，则可以转换为永久免费许可证。

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When the day comes that, in the true spirit of entrepreneurial free market enterprise, someone who wishes to leave their job (and their employer provided health benefits) to begin their own business discovers that the acne they suffered as a teenager prohibits them from getting a health insurance policy, that is the day such an individual will understand what has been lost.

FORBES: Big Health Insurance's Head Fake Gives Cover To GOP Congressional Failure

The BlackBerry Enterprise Service 10 software as well as a limited sixty (60) day free trial (includes client access licenses) is available to be ordered here.

ENGADGET: BlackBerry Enterprise Service 10 now up for download (video)