Finally, Wordpress 2.1 codenamed Ella, after the Jazz vocalist Ella Fitzgerald hits the dock today

A summary of features is given below :

• Autosave
• New Tabbed Editor
• Loseless XML Import and Export
• Spell Checking
• New Search Engine Privacy Option
• Static Page Option
• Efficient Database Code
• AJAX Features
• Feeds Remake

For a more detailed list of Features and functions visit Wordpress Development Blog