"It appears that Elaine Cunningham's much anticipated Legacy of the Force sequel, Blood Oath, has either been postponed again (it was originally scheduled for release in April this year but had to be put back to December because LucasBooks had not received Elaine's manuscript in time), or even cancelled. This is because RandomHouse.com has removed their listing and Amazon.com have stopped taking Pre-Orders for this paperback. The last time Blood Oath 'disappeared' from RandomHouse.com was when it's release was re-scheduled from April 2009 to December 2009. However since RandomHouse.com's listings can only list scheduled releases for the next six months, it is possible (and more likely than cancellation) that Blood Oath's release has been put back beyond RandomHouse.com's listing capabilities, i.e. it has been re-scheduled for release beyond December 2009 for reasons, as yet, unknown."
Nothing official has been thrown out there yet, but we'll let you know when we hear more.
Update: (23 June) Lucas Books editor Sue Rostoni is back from her vacation, and over at the StarWars.com forum, she's posted an update.
It seems that Blood Oath has been delayed by "events beyond the author's control, or wishes", and they're hoping for a release in April. Best wishes to author Elaine Cunningham, and I hope we can bring more good news on this soon.