Map-based travel diary service?

I'd really like a map-based travel diary service. Does anyone know of a service, or open source projects that could easily be modified to:

- Show a (google?) map - Include routes of driven or gps routes - Contain location-aggregated icons on map for photos based on photo metadata. Maybe photos are on the service, or maybe they're on flickr etc. - Has Icons on map for blog or 'diary' entries.

You'd be able to see your route between cities, click on a city "photo" icon to zoom into the city and see all of the icons for photos taken at different spots, or click on the 'blog' icons on the map to see what you talked about.

An interactive view of a trip.