Features

(by no way complete yet and in no particular order)

Interface & public concerns

Valid XHTML + CSS + Web Accessiblity conform
Multi Language Ready
Multi Lingual Admin: english and german are currently available. French admin is also available but some parts are not translated yet. You can easily add new languages.
Integrated WYSIWYG editor (BXE, kupu, FCKEditor)
Different Content Editors possible (form, plain, bxe, kupu, file upload...)
Fulltext search (based on mnogosearch)
Livesearch
Dynamic image resizing
Full UTF-8 Support
Most configuration can be done in easily readable XML files and/or via the admin
Blog Plugin
- Sending and receiving Trackbacks
- Spam Comment Protection
- Nested und Multiple Categories per Post
- Tagging Support
- Plazes and Geolocation support
- Public/Private/Draft status for posts

Based on Popoon and PHP 5
MDB2 as DB abstraction layer
WebDAV support
Data can come from everywhere (DB, Filesystem, etc) with the appropriate Plugin
XSLT for templating
A simple permission module (a more powerful is in planning)
TAL for templating as an alternative to XSLT
Every page can have its own meta info for html et. al output
Very flexible Plugin System
Filters
Portlets
PDF output with xsl:fo and FOP
FormWizard (per XML configurable)
RSS import/export
Blog Plugin
- MetaWeblog API XML-RPC support
- Decentralized moblogging support via the MetaWeblog API (mailserver,mail2blog programm and blog can run on different hosts)

patForms form-filter to build advanced forms
hostpoint.ch ready (runs out of the box on shared hosters like hostpoint.ch) => No more, because PHP 5.0.3 is (still) running on their Servers. // runs here on a hostpoint box with PHP 5.0.1 and the new inc/DirectoryIterator.php.
Advanced Forms in admin for editing database entries.