Dropped mine for the first time a few days ago from the table. And I am usually very careful to avoid these kind of things. There was a light scratch on the case but no issue with the operation and the rest - but it did not fall while being opened, so that may be why there was no issue.
Hell, I've left mine outside all night, overnight, in the middle of a cold Pennsylvania winter.
Doesn't do a thing to the Droid, still works like a charm. I dunno what it is about Motorola phones, but they are damn near indestructible. Like I said, I never could care less when I drop my droid, I know it will be fine.