You can create a shortcut to dial a person and put that shortcut on your home screen (you could also create a folder to hold all of your speed dial shortcuts).
To do so, click the "+" on the Home screen,
then click "Shortcut,"
then click "Person",
then choose the person you want,
then choose the number you want and
voila... a shortcut that will dial that number for that person appears on the home screen. You can also do this for one-click sending of texts and emails.
The only thing I can't find a way to do is to rename the icon to make it more clear WHICH function you are performing in case you have multiple shortcuts for the same person.
Hope this helps.