关于字体方面的授权

宋体、黑体、楷体其实也是有版权的，北京中易 —— 这应该可以解释为什么有“文泉驿”。
Mac的字体不清楚，微软雅黑可以看这里： http://www.microsoft.com/typography/fonts/family.aspx?FID=350

The Microsoft fonts are available for license to software and hardware developers who would like to distribute them with their products. Microsoft fonts are professionally designed and optimized for screen and print legibility. Through our license with Microsoft, Monotype Imaging makes them available to end-users, enterprises and for distribution in ISV and OEM products under flexible licensing terms and customized implementations.

这些版权信息在健全的字体里都能找到。

微软雅黑的嵌入权利（embedding rights）是这么说的：
Preview & Print Embedding Allowed

License 是这样的：
You may use this font as permitted by the EULA for the product in which this font is included to display and print content. You may only (i) embed this font in content as permitted by the embedding restrictions included in this font; and (ii) temporarily download this font to a printer or other output device to help print content.

相比之下，Mac OS X 自带的华文楷体的嵌入权利是这样的：
Preview & Print Embedding not Allowed

我不太清楚在 Windows 下能不能看到这些信息。想来如果查看字体文件的详细信息应该就能看到。

文泉驿遵守的是GNU通用公共授权，这个好像也不能用在商业上吧？