TakaraTomy seem to be running Lucky Draw campaign for the upcoming "Darkside Moon" line with the usual gold vac-metal toys. I can't read Japanese so I can't provide any more info than that.

http://tf.takaratomy.co.jp/event/2011/mechtech/

They also seem to be running a campaign of some sort for vac-metal MechTech weapons. I presume they will be "buy X amount of DOTM toys and get this for free" dealies.

http://tf.takaratomy.co.jp/event/201..._darksidemoon/