Is there a mod that will disallow subsequent submissions from the SAME url that's in the validate.db file?

Just like in MSN Search: When you add more than 1 URL from the same domain within a day, you get this automatic error message:

Multiple Submission
Sorry, only one url per site is allowed per day.

It would be an excellent mod to have -- this will prevent mass spamming and save us lots of time deleting them in the Validation page manually.

John
http://www.yahoosuck.com