As Joomla and community extensions have grown and matured over the last 5 years, the admin UI needs to allow for the way the workflow and features have changed.

General settings in each component's 'Options'.

On/Off and priority settings in 'Meta Options' for each 'item/article' view.

Make it possible to search for new extensions in JED and install selected extension from the backend of a website (WordPress like)

A Native Drop Down Menu based on jquery or mootools, no more suckerfish meno or another extensions to do it

Joomla 1.6 ‘User Profile’ plugin has an option for Terms of Service but no option to set TOS would like to suggest to add a drop down to choose an article to make it as TOS or an input box to write article ID for TOS.

Like boggers, wordpress we can have a full functioned blog for joomla witch includes comment,comment, approval, pinback , sharing etc...

Create an index of all the content within a Joomla site for improved searching and cross-linking of content. Improve search performance, accuracy, and relevance.

editing by using the drag-and-drop features of a rich administration interface... (extentin manager, editing area, etc.)

We need a rapid development tool for joomla like in cakephp and zend frameworks do. Joomla has a good framework. A joomla rapid development tool will make developers to develop their controllers, model and views. This will change joomla from cms to a great web development framework.

be good to be easily add custom fields to the registration form - additionally change the display order of the fields

Build a mechanism for integration the Media Manager with external media sites such as Flickr, YouTube, Vimeo, etc.

Put content through a customizable workflow before publishing

JQuery and MooTools work integrated without conflict

Built-in ecommerce system like shopping, payment. So that joomla will also be called as CMS as well as ecommerce management system.

Thus the user will use the inbuilt core functionality, with using third party components.

the wyswi editor make unwanted change in the code..

there should be a tab where you can put javascript and css in there...

gr.

Implement RDF metadata
+ RDF is designed to be read and understood by computers
+ RDF is a part of the W3C's Semantic Web Activity
+ RDF is a W3C Recommendation

Expand the plugin manager as in the module manager, to be able to assign the page where to load or not each plugin.

Expand the Media Manager to allow users to build media galleries which can be displayed in various ways. Build functionality to handle basic image manipulation or integrate with third party media manipulation services such as photoshop.com or kaltura.com.

Show Modules, and position by languages.
for example display Module #1 for English Language and display Module #2 For another language (For Exmple Persian [Farsi] Or Arabic) is RTL Direction. its very simple thas CSS Set and programming.