FFG had posted to their Twitter account that a huge shipment of Star Wars RPG dice was on its way to their distribution center soon. Those dice shipped the same day as Wave 8, along with the Imperial Assault Bantha and Smuggler expansions. I'm feeling pretty hopeful that this stuff will start shipping out within the next week.
Wave 8 - were are they
I think odds are decent for a preview today. If you track the timeline of the previews:
Dec 4: Ghost Part I (Friday)
Dec 11: Ghost Part II (Friday) +7 days from last
Dec 31: Inquisitor TIE (Thurs, as Fri was New Years Day) +20 days from last
Jan 12: Mist Hunter (Tues) +12 days from last
Which puts us about 56 days (8 weeks) from the first, or 1 preview about every 2 weeks. That would be today and, aside from the last one, all of them had been at the end of the week (FFG had the holiday off).
So, "pattern" generally holding suggests a preview today, with a release announcement 1-2 weeks after.