A recent posting on an Apple developer's blog Musings from Mars depicts new Safari features built into the latest developer preview of Leopard. As of this posting, MacRumors cannot independently verify the claims, however the blogger posts multiple video clips of the features. The blogger highlights the following features:
Tabbed Browsing Enhancements
Following the lead of other browsers, Apple has implemented a customizable tab-bar so that users can re-order tabs via drag-and-drop. Apple has also extended the concept to be able to make a window from a tab by dragging a tab off of the tab bar.
Search Improvements
The Safari search option is now integrated into the browser window much like Firefox's implementation. However search results are displayed all at once by default rather than Firefox's one-at-a-time approach.
Resizable TEXTAREAs
Safari will allow the user to resize a text area (via a drag corner) in an HTML form and dynamically redraw the web page to fit the new size.
Leopard was previewed at this year's Worldwide Developer Conference, and should ship next spring.