I say the 5 AIs exist as a "ghost in the human machine" idea, moving from person to person to manipulate them against the rest of the Cylons.
That's my thinking too. The way the other Cylons talk about them, they're more advanced. The existing Cylon models can only download to their model shell. A Six does not download to a Sharon or vice versa. A logical step above that would be to be able to download to anything with the capacity to hold them.
This kind of feeds into my theory about what happened to Six and Baltar during the nuclear explosion. Radiation alters their ability to function and download, which was also suggested in the original premiere. Six's download was altered by the radioactive blast, which accidentally passed through Baltar and inadvertently "swapped" those parts of consciousness which could be considered binary, which is why each of them has their own pooka of the other. And is also why the final five could hide in *anyone*, ie: the formats are compatible.
There are a myriad of #6's and such, each similar in personality, but also each suprisingly unique as we've discovered. I have a feeling the final five are single entities. There's one of each of them, no more. It might be why the Cylons made no more of them and fear them. They have none of the boundaries that the existing Cylons do.
Edited by Alpha Omega Trion Supreme, 02 April 2008 - 06:06 PM.