This is, unforetunately, a cruel April Fools Joke. I didn't see word of PSO Ep. 4 ont he site the guy gave, and fromw hat I've heard from a freind, there hasn't been any articale found, or proof of this rumor.
Well there probably will be a PSO 4 someday but unless they totally overhaul everything(I mean everything char, char modeles, enemies, HAVE a story, the battle system... everything) Volt is right PSO is dead even IF they do.
"Phantasy Star Online' isn't gonna be remade, atleast the story line is. There will be no more episodes. It is possible they may have a Phantasy Star [something] that may be online, but PSO is dead. (Not the PS series)