I've been waiting a lot for an extension like this. Highly customizable, very easy for install and manage, free... Fast and secure migration from other comment components. I'm very impressed with the included permissions system, and JComments is well translated to spanish.

I have only a suggestion: Add support for SMF avatars through JFusion.

Thank you, developers!

AutoTweet is a great extension. It's very useful, and very easy for install and manage. It simplifies work.
Saving an article, you are updating your Twitter account.
It also has a great and fast support!!

Thanks to the developer for this excellent extension.
I've tested it, and runs ok, and it is very easy to use.
I hope the developer update Football pool also, for 1.5 native.

Apoll is a great extension for Joomla Polls. Looks very nice. I only have one suggestion: The ability to create polls with multiple answers, with checkbox instead radio buttons.

This extension is very good. You can select the bookmarks sites that you want and the most important: add more.
Only one bad thing: Is not XHTML valid. I think that ampersands causes the errors, and I hope will be fixed in next releases.