EDIT: Does anyone know any other map provider which reads from a KML file? Looks like the file is up, just downloaded it, and google doesn't want to load it. Maybe it is too big?
Ok, looks like it is a file size limitation. Because XML is so verbose, the only way I could get all markers to appear was to remove some of the data items.
I removed the <description> tag which included IP: and Version: data items.
Without those, the <styleUrl> was no longer needed either.
$ cat "bitcoin.kml"|sed 's/<styleUrl>.*<\/styleUrl>//g'|sed 's/<description>.*<\/description>//g'
So now the file loads, but no longer do we have the red / green indicators:
Look how much that map has filled out over the past few weeks ... very impressive!