you do not have to do a hard reset if your droid locks you out
I was so frustrated... It said that I had logged in too many times with the incorrect log in code and so it was making me sign into my Gmail account. I signed in to my Gmail account with all the right information and it still wasn't letting me sign in. I read some of the forums and they were all saying that I had to do a hard reset but I didn't want to loose all of my information. YOU DON'T HAVE TO DO A HARD RESET... all you have to do is create a new Gmail account on your phone and sync it with your phone and sign in with your new account and it will unblock it without losing any information... here is how to do it.
1.call your Droid form another phone that way you can get into your screen
2. Hit the back button until you are at the homepage
3. go into your settings
4.go into accounts and sync
5. click add account at the bottom
6. once you have created the new account make sure to turn the sync off of your old account and sync your phone with your new account
after all of this your phone should be unlocked... it worked for me.
once my phone was unlocked I just went in to accounts and sync, deleted the new account and synced with phone with my old account.