interactive maps

I am new to Drupal and am attempting to create a "Sales & Rentals" section to a small but multi-HOA site I am building. Using CCK I have already created a "Calendar of Events" and "Amenities" sections. I have setup all of the fields for the real estate information and can setup exposed filters in views for Bedrooms, Bathrooms, Etc, my questions is, what should I use for an interactive map?

The map should be limited to my neighborhoods.
I would like to display a house icon on the map wherever a property is active

I'm looking to see if there is anyone out there who has developed an interactive map or a virtual tour application (or a combination of both), using Drupal or other technologies. If in the greater Toronto Area, please drop me a line to discuss.

Thanks,