B&H has a cool Sigma lenses deal with savings up to $200. Click here, then choose the mount type you need (Canon, of course!), and get your lens. On the Sigma 105mm f/2.8 EX DG OS Macro Lens (click here) the saving is $200. But: the deal expires 5/31, so hurry up.
Next, there is a memory card deal. The Lexar 8GB SDHC Platinum II Class 6 for just $6.99 (click here), but there is a very limited supply at this price. This deal may last just a few hours.
Finally, B&H has the new Canon WFT-E7A Wireless File Transmitter as new arrival in stock for $849 (click here).