I don't know about you, but the Droid has a devil of a time with my street name. I have found a quicker way to get it to guide me home without debating semantics with it:
If you have a contact's physical address, you can navigate to them from Contacts. For example, in my "Home" contact I filled in my physical address. I go to Contacts, click on "home" and "view home address". Google Maps pops up and labels my destination.
I then click on the address bubble and it gives me several options, one of which is "Navigate". Hit that, and car mode starts up with the destination already programmed in!
If you have places to go and the Droid doesn't understand you when you talk to it, then consider entering them into Contacts and navigating from there.
I Hope this helps someone else out there