NetBeans 4.1 Beta is now available for download. As per the release roadmap, this release should be followed only by the final release of version 4.1 in May 2005.
The NetBeans Announce Mail says "Included in this Beta release is a
special Eclipse Project Import module available from the Welcome
Screen of NetBeans IDE 4.1 Beta. Automatically Import Your Projects
Out of the Dark to NetBeans 4.1"