GIS System - Traffic Based Routing - Flex(repost)

Hi, I need a GIS/Mapping software expert to work on an application we have been developing. We are developing a rich map application that will be used on web. the user can choose location A, & B and the map will show the traffic in those routes. We already have the routing algorithm We need expert GIS person to help in following areas Requirement 1. Currently we were using Google Maps, but we realized we need to have our own GIS system. Hence, we need someone to create the GIS db from a shapefile. Then we need to create road segments, the logic to create this has already been developed by us. 2. Once we attach the weights to those road segments, the routing can take care of program. 3. What we need is someone who can also configure and work with open source Mapserver which can render Maps and our overlayed applications on web. 4. The final GUI can be simple Ajax based map application or Flex with some user input.? Let us know your expersite in designing such GIS systems and we can talk on what can be deliverables.