Airline ticket metasearch

I need an application that allows users to search for airline tickets across multiple sites and display results in a unified view. It should search and parses the data from each site, removes duplicates, and displays to the user the results. Technical Requirements The UI is not important, it will be rewritten. The importance is the backend part which queries the different sites and parses out the data. It should be written in C++ or C#(speed is very important) and must be a component which can be used in VB.net/C#/C++.net. It should be modular, fast, and extensible. The business logic for adding a new site to search and the parsing for that site should be stored in an .dat or .xml file which can easily be updated without having to install the whole program [login to view URL] goal is to use it for a Windows Application, not a web application. When product is final, full code is required. Do not use any open source code or libraries please. Feature Requirements Search UI User must be able to specify Departing Airport/date/time, Arrival Airport, Returning Date/Time, number of tickets. Results should display: -Airline Name -departing airport -departing time -arriving airport -arrival time -numbers of stops -Duration of flight -lowest price found (best deal) -Site the lowest deal was found on -link to access the particular deal on the site -List of sites that had the same flight, and their individual prices, links to the flights on each site User should be able to sort results on :Price, arrival time, departure time, Airline name, stops, Site name (sorting is optional feature) The application should assist the user with finding the appropriate airport. The list of airports should an updatable file (xml). It must search the following sites: -expedia -travelocity -orbitz -jetblue -united -hotwire