Is there some kind of parametrized url on archiva, where I can get the latest snapshot/release of an artifact? sth like https://myhappyarchiva.com/archiva/repository/com.example/com/example/myproject/LATEST/myproject-LATEST.jar
That feature is not yet available, however you might like to file an issue at http://jira.codehaus.org/browse/MRM. A related issue is http://jira.codehaus.org/browse/MRM-805.
To achieve this today, the best thing to do is either: