How are snapshots getting deployed from hudson?

[David Jencks]

The recommendation is that snapshots that get deployed to apache's  
nexus be timestamped.  I fixed the build so that mvn clean deploy will  
result in unique (timestamped) snapshots but the ones on nexus are  
still non-unique.  A little detective work reveals that they are  
getting deployed by ci-hudson.  However the hudson builds on the  
apache hudson are only running mvn clean install  so I'm wondering how  
the snapshots are getting deployed.

I found an email referring to 
http://cwiki.apache.org/confluence/display/ACTIVEMQ/2009/04/17/Continuous+Integration+Server
Is this the latest documentation?
thanks
david jencks