there is only 2 DB's that are currently still being worked on, the issue becomes, there not compadable, it would require more work then its worth to combine them ( due to NPC ID #;s, loot table, NPC spells, and a multitued of other things that are diferent)

As to the items, the Devs have the current item file, it is updated every time someone uses the packet collector, so there is no need to combine multiple item lists, just use theres.