Apple continues to provide Mac OS X 10.4.2 updates to developers. Apple has reportedly posted a new build (8C46) to the Developer's site today with further bug fixes related to Dashboard memory management and iChat video conferencing
The latest Mac OS X 10.4.2 versions (as of 8C40) are said to include a Widget Manager as described in this ThinkSecret article.
The new widget manager reportedly has the appearance of a widget itself -- but unlike most widgets, it cannot be flipped around to reveal special options or preferences. The widget manager's design is faintly similar to that of the iChat buddy list; it is laid out as an oversized window that lists all of a user's installed Dashboard widgets. Running down the left side of the list are checkboxes which allow the user to quickly enable and disable widgets. Along the right side of third-party widgets are red stop sign-like icons that allow the user to delete widgets -- upon clicking the icon, an overlaying dialog asks for confirmation.
A screenshot of the Widget Manager can be seen here.