After a long time without a release of maven-proxy, I decided to take care of making this one.
It includes improvements to the maven 2 support and now it comes also with a war file to deploy in your appserver.
You can get it from http://maven-proxy.codehaus.org/Downloads. Be sure to read the installation and configuration instructions because it’s not trivial.
This will be probably the last release of maven-proxy as its functionality will be included in the next Maven Repository Manager.