WEB BASED DATABASE & GOOGLE MAPS

I am working on a website which uses Google maps and a back end database. This website is for real estate listings... I need to be able to input the required information per listings... such as: ADDRESS ASKING PRICE HOUSE SIZE NUMBER OF FLOORS NUMBER OF BATHROOMS (ETC.) I need to be able to upload this via a web GUI which will add it to a database. Then these listings will be pulled from the database... and dropped on a Google map... with info points at each location. A sample can be viewed at [login to view URL] and here is my website where I would like to upload [login to view URL] The left hand side will be little summaries of each listing from the database.... the user can click on these and it will bring the user to the location on the map. Thanks Sebastian