New Sigma and Tamron lenses mail-in rebates and instant discounts

Sigma 105mm f/2.8 EX DG OS HSM Macro Lens, on sale at $699 after $300 instant discount
Adorama notified me that they have new rebates on Tamron and Sigma lenses. The Tamron lenses have mail-in rebates (info) and all lenses eligible for rebate are listed here, plus you get 4% in Adorama Rewards.
Sigma lenses have instant rebates up to $300. All eligible Sigma lenses with instant discount are listed here.