Well it didn't take long to get our first spoilers for Season 4 :) One of the site Admins over at AICN posted the following. (Thanks to Lyly for the info)
JUST GOT CONFIRMATION
by The Real MiraJeff May 24th, 2007
07:12:42 PM
Next season of Lost will feature BOTH flashbacks and flash-forwards.
Source: AICN
