Got it acceptably working with MarkerClustererPlus using the mouseover listener to send requests to MaxZoomService. So many of those requests will be sent when there are many clusters - though there are (currently) no limitations of those requests.
http://www.wolfpil.de/v3/mzs-clusterer-plus.html -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to google-maps-js-api-v3@googlegroups.com. To unsubscribe from this group, send email to google-maps-js-api-v3+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.