An early release of version 0.89.02 has been posted to the Download->Early Releases section.  The posted version is marked as 'beta 1' and, while quite stable, has not yet undergone full testing.  This release contains the same features as the previous v0.89 release but is has now been made Joomla 1.6+ compatible.  

Huru Helpdesk v0.89.02beta1 is a single installer package compatible with Joomla versions 1.5,1.6 and 1.7.

Feel free to download this version and post comments to the forums.