Collaborative translation project with a central database

This project has 5 requirements: (1) A web-based collaborative system where multiple users, with different access permissions, can view and edit a translation/transliteration held in the central database (2) Central database should be a web service based upon XML-RPC or REST technology (I am not too worried about technology but software developers should be able to access the central database using whatever programming language they wish and create software using the database. Also, full documentation about how to access the database repository for software developers must be provided) (3) All changes to the central database need to be logged and there needs to be the ability for a change to be reversed, much like a wiki system (4) All changes to the central database should be able to be pushed out to any applications using the central database (5) Database archives should be able to be produced with a version associated with them I can provide the current database which is in Microsoft Access format to the winning developer. I am open to what technology and database should be used for this project. I require daily updates without fail, and for the developer to be available via Skype and email on a daily basis. Bids under $400 will be favoured.