Are magic items powers 'active' for non-concentrated users? Or do
they remain an augment only? Obviously some items only lend
themselves to being 'active' (like a bag that catches slyphs), so
does this mean anyone who has spent a HP on them can use the active
power?
And what about Wizards using Theist items? Does the source of the
power have any bearing, or once the power is installed is it just
that, a power?