You should already know that you can exclude certain classes from auto-import and code completion in IntelliJ IDEA 8.1. In Maia it will be even easier — you will be able to do it directly from the auto-import popup:
And from completion list, too:
IntelliJ IDEA auto-import popup is a very handy feature that lets you stop worrying about import statements in your Java class files. However, sometimes it can show more choices than you need (e.g. when some of the class names in your project match the names of internal JDK or unrelated library classes).
To make auto-import easier to use and to avoid accidental imports of wrong classes, you can open the Settings dialog, then go to Editor | Auto-Import and add their package prefixes to the exclusion list. This will also hide the specified classes from class name completion lists.
Twitts about IntelliJ IDEA