Sam's Club. They just hit the market in the past few weeks I think (I saw it in a cNet article). They're $5 each to members. If you're not a member, you can get a pass to purchase them at $8 each.Where are you seeing 100w bright stiks? I can't find em online to buy
The specs on the box sound much better (95 L/w). They're using better diodes I guess. With the cap off, this should scream. The 10w (60w equiv) is only 76 L/w on the box. But, you've seen how the design makes it so good compared to the Cree 9.5w A19 (which is about 88 L/w with the rubber protective coating removed). If removing the cap from the 16w (100w equiv) BrightStik will result in a similar gain, that's going to be like 120 L/w (by comparison).
I'll cut mine open and see if they are indeed forward-facing like the 10w GE. It's possible the design is different, maybe a circular positioning of the diodes like that Cree goudenough posted a picture of. If it's flat, that's gonna be a winner for top-lighting in a 3-4' tall space.