A long time ago I tried to produce these periodically. Here's another try. I will post the solution to this headline puzzle a week from today, 2007-12-21..
ZW CKFVFM IKOF GUPDW HKY RPUG OVCR DHMRDF TVWWVKF MDCPW WDBW
JA GJMS DMSZJAB DHOKBEBODB NSUON HK DHZLEHZSNB
BVJVK TEAFSM VLLMKQ VFNM QE TVAMKQFRFVR TLFJM JFRFKQML
KNOPCNZN PSRW HNCNSPK KPMG YD SNZY MC ZYPYN JXCNSPK
IQRGWMMWP JBBRZER ZJZNVKBE DMKA WR GKR ABJJR RJKOZ
Instructions for solving should be here.