From another blog.......and I read it somewhere that the signal may or may not have come from earth. In fact the directors and the writes haven't even nailed down in which year the fleet will arrive or exactly what year it is on earth.
http://forums.spacecast.com/forums/thread/308876.aspx
The key to the episode was "All Along the Watchtower". Every bit of dialogue in this show has a purpose...but when the characters in the show are actually saying the lyrics of the background music as dialogue...it's kinda freaking obvious there is "something" to it. Specifically, the lines "there's too much confusion", "No reason to get excited" and "I can't get no relief" are all spoken as dialogue by the new "cylons"...if they actually are cylons....which I doubt. Therefore, it makes sense to identify WHY the writers chose that song (who cares how good the rendition was).
The lyrics are listed below. Please note this song is essentially, about class warfare which was an underlining message throughout season 3. The song references a Joker and Thief vs. the Princes in the Tower. Jokers are members of a society that support the ruling class. It's important to point out that all four people who believe they are cylons are essentially the servant class or work/support someone in a ruling position. Thieves sneak into things to take something away in the same manner in which the cylons snuck into the human society to steal the planet and the human way of life. The song tells of the Joker and Thief working together to challenge the princes in the watchtower who represent the "establishment". Throughout the season there were references to the "elite" and "ruling class". Could this be foreshadowing a collaboration between the Joker (servant class of human society) and Thief (cylons) to over though the current ruling class (Adama, Roslyn, et al?)
Additionally, the song also ends with a reference to the "wind began to howl" which is representing a change in the weather. To make the connection to the song even more obvious, Helo specifically states "There is a change in the weather" about to occur.
Either way...damn good stuff. It makes me wish I had paid more attention in Literature classes in college!
Lyrics....
"There must be some way out of here," said the joker to the thief,
"There's too much confusion, I can't get no relief.
Businessmen, they drink my wine, plowmen dig my earth,
None of them along the line know what any of it is worth."
"No reason to get excited," the thief, he kindly spoke,
"There are many here among us who feel that life is but a joke.
But you and I, we've been through that, and this is not our fate,
So let us not talk falsely now, the hour is getting late."
All along the watchtower, princes kept the view
While all the women came and went, barefoot servants, too.
Outside in the distance a wildcat did growl,
Two riders were approaching, the wind began to howl