First and foremost...
I am not in the least bit advocating that James Callis and Tricia Helfer reprise their roles as Head-Baltar and Head-Six respectively.*
I had posted in the Caprica Pilot thread a mention about the angels, who we know as Head-Six and Head-Baltar, making an appearance in Caprica given that they would have been around at that time.
What I'm thinking is that it'd great if it turned out in the end that two of the secondary characters where indeed the angles who appeared in BSG as H-B/H-S. Maybe a cleaning lady in Adama's building and a gardner at whatever-his-name-is's house.
*For those who don't get that as Angels they choose to appear as H-B and H-S and as such can appear as anything that they choose to.
(P.S. I'm honestly thinking it's just a matter of time until a poster makes some comment about Callis and Helfer appearing as Head-Baltar and Head-Six as detracting from the story, completely missing the fact that as Angels they appear as they choose to and thus wouldn't appear as Baltar and Six, despite my obviously disclaimer.)