The HAR 2.x source code has been published today --I apologize for the delay-- and is now available under the CDDL 1.0 license on Project Kenai, a collaborative hosting site for open-source projects sponsored by Sun Microsystems. HAR users are encourage to join the discussion --whether on the wiki or mailing lists-- there.
If you feel like checking out --and why not, contributing to-- the HAR code, note that Subversion was selected as the version control system; the Subversion URI is https://kenai.com/svn/har~har-repository. If you are not very familiar with Subversion and do not have yet a preferred IDE, NetBeans 6.x comes in with a built-in integration with Subversion. Basically, if the Subversion client is already installed on your system --try
which svn on a Unix-like system--, just select Tools->Subversion->Check Out... in NetBeans --have your Kenai login and password handy.
Below is a snapshot of what you should be ending with.