Go and read Dan Darling's special analysis, Holiday Terror Alert. The section "Decentralized? Think Again" is very interesting. Here are two articles with information on Osama Bin Laden's whereabouts:
Bin Laden in Iran. Islamic leader says terror kingpin staying in nation with 'consorts'.
Discerning Terror Chatter.
Related: My post, IS OSAMA BIN LADEN IN IRAN?
US seeks bin Laden here, there and everywhere.
Al-Qaeda chief, aide in Iran: UK Report.
UPDATE 01/05/04: Tape probably Bin Laden, CIA says. Click here for a translated transcript of the tape.