This post is the spin-off of a question asked here on Topliners. A request for a "hands-on" solution prompted me to create this for anyone interested in a possible solution to this question. The original question is posted at http://topliners.eloqua.com/message/16305
There are many factors to consider when attempting to build this type of solution. The first, as is the case in the original question, is to revisit your lead scoring model. Are you passing the right leads to sales, and if so, why are they being rejected? When a tweak to your model isn't appropriate, you may consider a solution similar to what you will see below. This solution will apply a date stamp to a new "Lead Created Date" contact field, which we will check each time the contact flows to the "Create Lead" step in your CRM update program.
Here is a sample program flow. I will break out the two main steps to show the configuration used.