使用网上公布的http://m2eclipse.sonatype.org/sites/m2e 网页可以打开
但是在myeclipse安装maven3插件总是报：Network connection problems encountered during search
详细信息是：
problems encountered during search的错误提示。查看了detail信息，显示：
Network connection problems encountered during search.
Unable to access “http://m2eclipse.sonatype.org/sites/m2e/”.
Error parsing site stream. [White spaces are required between publicId and systemId.]
White spaces are required between publicId and systemId.
Error parsing site stream. [White spaces are required between publicId and systemId.]
White spaces are required between publicId and systemId.
按照上面的地址打开网页可以发现有4个目录，多方了解，其中只有0.10.0.20100209-0800/ 目录是好用的
Help->Software Update->Find and Install->Search for new features to install：
实际步骤来啦，New Remote Site，输入一个Name，URL使用http://m2eclipse.sonatype.org/sites/m2e/0.10.0.20100209-0800/ 确定 完成即可。