For JellyBean 4.2+ it can be added as a Lock Screen widget, and can be resized.
The source code can be found here: https://github.com/Ryan-Myers/WordClock-Widget
Recently changed in this version:
- When the widget is added now, it will default to white. If you want to change the colour just tap on the widget.
- No more need to hit the back button to start the widget!
- Can now be resized and added the lock screen in JellyBean 4.2+
- Fixed rare issue that could result in the time not being updated after while.
- If it wasn't updating for you, and you're coming from the previous version, just remove the widget and re-add it again to fix it.