Native SQLite database support
In addition to the existing database support, please add support for SQLite databases, without a LINQ layer like for SQLCE. Just a raw database with SQL commands like we are used to. SQLite is platform independent, that means it is easy to exchange data between Windows, Windows Phone, Android and iOS devices.
Someone from the Admins should mark this as completed since it is possible to use SQLlite now in WP8 (WP7 will never support it).