We (thanks) and others have been told that the upcoming Canon W-E1 WiFi adapter for SD card slots will sell for less than $40 in the US, and around €45 in EU. That’s all we know so far, along with some W-E1 specifications. The W-E1 is very small and lightweight, coming at 24 x 32 x 2.1 mm (around 0.94 x 41.26 x 0.08 inches) and weighting just 2 grams (0.04 oz). That’s the size of an SD memory card. The W-E1 will work on many Canon DSLRs.
There will be an important announcement by Canon on August 25/26. It’s not only about the highly anticipated EOS 5D Mark IV, there is more gear coming. I made a list of what Canon is likely and less likely to announce at the end of August.