I just finished doing a major update to the CQ Blueprints page about using as a Repository for development. The Blueprint now demonstrates how to make use of the repo..com repository that Adobe has recently made available.

Customers who wisely choose Maven as their build tool should setup their own Maven Repositories and configure them to proxy the repo.adobe.com repository to provide access to the CQ related artifacts for your team. Some possibly outdated documentation on the /Adobe sites recommends installing and using Apache Archiva as your local repository. However, since Nexus is now being used actively to manage the Maven Central repository it has become the defacto standard for Maven Repository management tools. As a result, we recommend the use of Nexus over any other Maven Repository management tools, including Archiva.

via Using Nexus as a Maven Repository for CQ Team Development Blue Prints.Using Nexus as a Maven Repository for CQ Team Development – XWiki.