On Android, you can just hold the search button to bring up voice search and say "navigate to $address" and google maps navigation will guide you to the address, no need to type anything. You can even say "navigate to $business_name" and it will lead you to the closest one.

I'm sure everyone on here knows that you can do that on either platform. Presumably people don't think that is as good.

There goes my weekend...

Not sure if it's ICS only but there is now a widget that you can set up to navigate or get directions to a specific location in 1 click.

I'm not sure if it was just a CM7 widget or not, but before I got my Galaxy Nexus, there was a widget available to do that. When you place the widget, you put in the address it should go to (one thing I didn't like is I don't remember autocomplete or any contact selection being available for it, so you had to know the address).