I have done a lot of addon using LDB (and recently I am trying to convert them to libqtip).
Some friends of mine dont use a databroker display so I thought to use the minimap to attach these addons to an icon on it.
I usually use a code like this:
local LibQTip = LibStub('LibQTip-1.0')
local ldb = LibStub:GetLibrary("LibDataBroker-1.1")