As steve1307 mentioned, there are some other hidden, cart-only prices available on Adorama...
Pentax SMCP-DA 70mm f/2.4 ED Limited
List price $699; add to cart price drops to $549
Pentax SMCP-DA 70mm f/2.4 ED Lens Limited Edition -Black #21620 21620 Pentax SMCP-DA 21mm f/3.2 AL
List price $649; add to cart price drops to $539
Pentax SMCP-DA 21mm f3.2 AL Wide Angle AF Lens Black #21590 Limited Edition 21590
These are great deals. Thanks Adam for posting the PF exclusive deal on the 15mm f/4 Limited... that's what led me to start poking around on Adorama this evening.
In fact, I almost pulled the trigger on the DA 35 f/2.8 Macro Limited (which I posted earlier; Adorama list $699, cart price $529), but common sense --thankfully-- overruled my desires for yet another Pentax-fever induced spending spree... I already snagged a Pentax K-5 II (for $1029) and a DA 50-135mm f/2.8 (for $674, booyah!) on B&H late Monday night (so late, that it was technically Cyber Tuesday, ha). As much as I'd love to pick up a prime Limited, alas, the madness must end.
K-5 II and 50-135 should be here tomorrow. I can't wait!