终于 Rails3.0千呼万唤始出来。

感觉其实每次Rails升级都会带来不小的变化。这次3.0的变化尤胜！

按照DHH的说法：

Rails 3.0 has been underway for a good two years, so it’s with immense pleasure that we can declare it’s finally here. We’ve brought the work of more than 1,600 contributors together to make everything better, faster, cleaner, and more beautiful.