Final Fantasy-XIII.net) tells us that this silence will be over in due time. EGM's scuttlebutt suggests that the long-awaited MMO will be unveiled at next year's E3 in June.
It seems like a rather timely choice. It also seems to scream 'it's about time' as the aging FFXI is considerably outdated after having a nearly seven-year run. But, don't expect this new game to be a typical "updated" FFXI clone though. Producer Hiromichi Tanaka told EGM that "the next generation MMO that we're working on is going to be different from Final Fantasy XI. And even though we have the same staff working on the project, we're not going to make something that'll be exactly like FFXI."