The new jailbreak tweak HomeSpringPage allows you to create a blank page on your iPhone's Home screen to use with Dashboard X widgets. Dashboard X is another Cydia tweak that allows you to add Notification Center or user made widgets to your Home screen.
After you have installed Dashboard X ($1.99 via the ModMyi repo) and HomeSpringPage, the first page of your iPhone will be completely devoid of any app icons. This gives you the free space to add any Notification Center or jailbreak widgets you own. You can also use a combination of apps and widgets on the new page.