Thanks to STWN, i got this interesting links via Plurk. It's about 10 things you don't know about Apache 2.2. It's true that the migration from Apache 2.0 to Apache 2.2 was smoother rather than 1.3 into 2.0. But some people didn't realize what Apache 2.2 brings instead of just regular bug fixes. It brings quite enormous changes, which aren't realized by many people.
This article discuss those changes and bring it to you in a easy to read and understand ways, so for those who works with Apache should be reading this article.