I just listen to Scott's EC presentation of JSR 362 (Portlet 3)
It may be too late on the API level, but even for the RI (Pluto 3) would
looking at the EDR 2 of JSR 362:
Especially Chapter 18 Portlet Preferences.
I sense quite some synergies with configuration efforts along the line of
Since the RI of Portlet 3 is at Apache again, at least there I guess we
could explore using Tamaya to back it.
On the API level I'm afraid it might be too late, even for say standard