m2eclipse and aggregator/top-level pom
if you are used to create a directory for aggregator pom files just because eclipse couldn't handle it otherwise, then the last m2eclipse version can handle it, you just import -> maven-project and choose the top level directory where the aggregator pom is, it now works as IDEA 8 did(but not as nice..).
so now you can:
pom.xml the parent pom
and not anymore:
d:parent (where the parent pom is)