Adobe Flex/Air MSSQL/PostgreSQL Contact Management Database

I am looking to develop either an intranet web-based or desktop multi-user contact management database that incorporates biographical data, integrated user evaluation/rating system for contacts, ability to attach/associate documents to a contact (documents may be Word, .pdf, .txt, audio or video files), be fully searchable, end user friendly, easy to update and maintain, and aesthetically pleasing. The technology used should be either Adobe Flex/Air or similar, and the database used should be MSSQL Express 2008 or another free open-source database the is appropriate for large binary objects or streaming media.