To overcome the problem of too many "hotspots" on a map, most maps usually take the approach of combining them into a single spot with a label indicating how many spots are contained within that area. As you zoom in, it breaks down into smaller and smaller clusters; and eventually into the single spots.

I've seen this in many maps and believe it to be a far superior solution than what is done in HotSpots. I'd highly recommend going this route instead. It's what I was originally looking for but couldn't find one available.

Here is an example:
http://www.alloutfitters.com/map/

Thanks!