Google map with high-speed server-side clustering

Development of a google map with approximately 3 million markers, total response/loading time of 5sec or less on normal home PC, and dynamic marker loading as the map moves which functions similar to the following URLs. Only the map is required. Daily communication is also required. a) [login to view URL] b) [login to view URL] 125.859375/All/All/Any c) [login to view URL] d) [login to view URL] For full details see attached spec. Do NOT bid unless you are 100% sure that you can deliver. Initial prototype required for supplier selection. No deposits. No escrow. ASP only. No PHP, .NET or other platforms.