Are there song or litergy databases that can be imported into EasyWorship?
Either bought from EasyWorship or Third Parties?
To the best of my knowledge no, there aren't. Please note that I don't work for EW though.
Because of Copyright, EW only comes with the 230+ public domain songs. There may be other people using EW that will be willing to share their database with you, but legally, you would need a copyright license to be able to display any copyrighted songs or liturgy.