I agree with Cookie, if there could be somewhere, where a script developer could generate a GUID for a script and with that GUID we are able to update information within a specific scripters database which would include information for the script latest version etc. This could be in direct correlation with the new Script DB.
For instance if I develop a script called HelloWorld. I go to a development center and login/register select to create a new script. I enter the name of the script and in turn a GUID is created. This GUID would be specific to my script and no one elses. Once this is generated I can enter details for the script and any changes are sent as an update to a Moderator of scripts on the Script DB to approve changes. To prevent spamming the only time the changes need to be approved by the Moderator would be when a PLSC is uploaded to the server. (And then subsequent changes after that would be sent to the moderator)
This would be the best option because then developers can simply login and change details of their scripts (with approval from a Moderator of course).
This way if a script has a valid GUID then Plus! can check the server for updates