All POS and probably Sov structures have been removed from the market. And there looks to still be a two week lag before we see even the start of PI resource extraction...
This may be only a temporary measure. This may be permanent. CCP did not post any info on this that I could find. Regardless of whether it's only part of their plan or if it's all of their plan we (capsuleers) have to deal with the fallout.
POSAGEDDON starts today. Good luck all and batten down the hatches, the gun bunnies are about to earn their pay.
EDIT: And POSAGEDDON goes back on hold as CCP Navigator explains that the NPC orders will be restored June 2nd prior to going bye bye for real at some later point.