There were many references to the Lords of Kobol throughout the first season of BSG, culminating in the eventual discovery of Kobol itself. They were described as 'gods', implying that they were not human, and it seems like finding out who and what they were would be foremost on the minds of both the characters and the viewers. However, nothing much was said about them and then the show just moved on, ignoring one of the more interesting mysteries presented to that point.
Is there anything mentioned in the show that I missed, or discussed by writers or staff in other mediums, that would give us a clue as to the nature of the Lords of Kobol? Do we know if they were intelligent aliens, some form of magical being or angel that fits in with the religion of the show, or something else?