The previously rumored Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM lens is now official. Adorama has the price listed as $499. The Canon version is expected later this month, Nikon mount will be released in July, Sony and Pentax versions will be out later this year. The current 18-250mm model will be available for sale through the summer.
Sigma also announced a price drop on their 70-300 APO Macro lens (currently $199).