You want the ADDRESS BOOK to appear from pressing a shortcut key from the Homescreen? Tap the letter 'A', as long as you have Dial From Homescreen disabled at Phone Dialer scree > Options > General Options > Dial from Homescreen = NO.
Then you can use ALL the great homescreen shortcuts you want.
For details , see here: Home Screen Shortcuts - BlackBerryFAQ
Your Speed Dial from homescreen is actually still enabled, you just PRESS the corresponding key to the speed dial you wish or have set.