I've been trying to find out more about Maven 3 and Mercury (Maven Mercury is a replacement for the Maven Artifact subsystem, and a complete replacement for the HTTP/HTTPS/DAV/DAVS portions of the existing transport).
There seems to be very little of substance available at the moment, particularly for Maven 3.
Does anyone know of any guides/tutorials/plans/roadmaps?
I've found these resources so far:
I don't know if you saw it but there is a video of Jason's Maven 3 presentation on Sonatype's website: Maven Meetup: Jason van Zyl on Maven 3.
But, in my opinion, the best resource to learn about Maven 3 is the Maven Developers list.
Sonatype have posted an interview with Benjamin Bentman discussing API changes and main features of Maven 3.
They also mention that the developer builds of m2eclipse are now using Maven 3, and provide a link to the Maven 3.x Compatibility Wiki
Update: Another Sonatype blog on Maven 3. Outlines a number of the issues with Maven2 and what is being done in Maven 3 to address them.
The Sonatype tag "maven" remains a good official source of information on Maven in general, and Maven3 in particular.
Note: I was the ParisJUG (Java User Group) yesterday, which included a Maven 3 presentation.
Mercury was said to be retired from Maven3 itself...