If I understand the concept correctly, this basically is "self-spotting" - which I believe to be a great idea. It certainly would not be allowed in contest scenarios, but for most users it would be a wonderful resource.
I now use Dave's (AA6YQ) DXLab SpotCollector program for cluster management. It's an excellent program which allows you to view spots using almost any imaginable filter. You can see spots by band, counry, mode, callsign, state, LoTW, etc. - or any combination. A program or online page providing the capabilities of SpotColletor to filter results could really make the "Who is Now Where" application a powerful - and POPULAR - resource. Instead of spotting someone else, you are just spotting yourself either manually or (preferably) your logging program polls your rig and does it for you. Bob - K3MQ