A couple of forum posts mentioned that 3 home screens are not enough. You can use folders to to organize your home screens and gain more real estate.
- Touch and hold the home screen, then touch Folders->New Folder.
- To rename the folder, open it then touch and hold the folder title bar.
- Drag shortcuts from your home screen to the folder.
- Add shortcuts directly to the folder. Open the folder first, then open the Applications tab, locate the desired application and touch and hold. The application shortcut will automatically be added to the open folder.
