B&H just received limited stock of the new 4K Panasonic GH4. You can find it here at B&H Photo.
The new Sigma 24-150mm f/4 DG OS HSM lens is now in stock for Canon DSLRs. Check it out here at B&H Photo.
(Note that there’s still a backorder message on the page at them moment, but that should be removed as soon as the inventory in their system is updated.)