Newegg has the OEM pricing up, and small discounts (~10) for pre-orders.
OEM Home Premium: $110
OEM Pro: $140
OEM Ult: $190
ArsTechnica Windows 7 OEM Price Comparison Chart
OEM Home Premium: $110
OEM Pro: $140
OEM Ult: $190
ArsTechnica Windows 7 OEM Price Comparison Chart