It's only in the CVS at the moment, so it's not official released. Maybe you have to wait for the update of your distribution or you build it on your own (don't know what distribution you are using).
if you talk to him our name really is "23" and the url 23hq.com - minor thing...
You can find all information on http://www.digikam.org
@Thomas: I will send him an email with the name changes. Should be changed in the next release.
Thomas: did not know about that name is "23", so I will change this for next version. It would be also cool to get SVG icon, as it could be used for menu action.