Due to a distinct lack of comments and a high demand for a comments extension for 1.6 which can provide functionality which rivals that of jComments I have created a simple but easily extended comments component+module combination. This comments extension doesn't use Facebook or Disqus like most commenting systems instead it uses a native system designed specifically for Joomla 1.6 using the Framework.
Udja Comments 0.3 Beta functionality list
Supports nested comments (replying to others comments)
Has basic spam detection, word/ip/email/domain filtering.
Avatar & Gravatar support
Fully using framework, LANG/HTML are both overrideable without core-hacks.
Uses a module for the comments so can be used with any component, not restricted to content.
Can be ordered oldest->newest or newest->oldest
Form position (above or below comments)
Pagination, and customisation of per-page
Automatic updates to component using Joomla 1.6 update section
Extension CSS can be turned on or off.
** Currently in BETA, Please let me know of bugs you find I will fix them as quickly as possible **
As always I would love to hear from anyone about features they would like to see included in the comments below.