I agree that the map is cool. And I can only imagine the amount of work that went into it; so way to-go Radio!

I can understand your frustration at the beginning, as you must have spent some significant time on setting it up. I am glad that you put it back up though. Sometimes these things take time to catch-on.
It seems that this has changed from being a "registry", to being more of a "locator", as someone else called it. This certainly has it's own value, like helping us connect with other Fiat owners in our area, for instance. In my case, Rook1 has done a great job of making sure the people who visit this site (and therefore would become exposed to this map-locator) are aware of the "Utah Spider Assoc" yahoo group. But others may not have the advantage of a "local cheer-leader". (sorry Rook1, no offense intended, if you don't like cheer-leaders

)
I still think that a real registry is a good idea. I think there were several posts at the beginning of this thread that discussed some of the features that a registry might have. Can this format that you've created accomodate those features? Or will we need to duplicate some effort, if the list determines that a registry is of value?
I think what you've done is great Radio. I think you mentioned at the beginning that this idea was born from another thread about how many still remain, and in what condition, geographic location, etc etc. (I'll take the blame for being a smart-a** in that thread and starting the "count-off", which side-tracked an otherwise very interesting question).
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I'd still like to be able to see, for instance, how many Spiders have been crushed / dismantled? How many are drivers? How many are restored vs original? How long do most Spiders stay with an owner? How many are in which countries? that sort of thing. And maybe your map will do many or all of these things? I don't know. I am accustomed to seeing that sort of registry in a spreadsheet type format, and so far the map doesn't seem intuitive in its use, so I'm excited about the things you've described that are in the works.
In the meantime:
I'm happy to PM you some details, so you can stick a pin in my head, right about where the Great Salt Lake is, in Utah!

I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!