The solution should speak for itself.
OKAYP EOPLE TIMEF ORSOM EREAL SECRE TMESS AGEST HISON EWASA VIGEN ERETO PROCE EDYOU SHOUL DHAVE TAKEN EVERY FIFTH LETTE ROFTH ECIPH ERTEX TITOL DYOUT HATTH EKEYW ASFIV ELETT ERSLO NGYOU WOULD HAVET HENDO NEAFR EQUEN CYCOU NTINO RDERT OESTA BLISH HOWMU CHEVE RYFIF THLET TERHA DBEEN CAESA RSHIF TEDYO UWOUL DHAVE THENU NSHIF TEDTH ELETT ERSAN DRECO NSTRU CTEDT HEMES SAGET HEKEY BYTHE WAYWA SBUFF Y
Okay, people, time for some real secret messages. This one was a vigenere. To proceed you should have taken every fifth letter of the ciphertext (I told you that the key w
as five letters long). You would have then done a frequency count in order to establish how much every fifth letter had been caesar shifted. You would have then unshifted the letters and reconstructed the message. The key, by the way, was BUFFY.
I've posted on Joss Whedon's show, Firefly, on this site.