New 16GB Eye-Fi flagship wireless SD card goes Class 10, priced at $100
If you are a fan of the Eye-Fi wireless SD memory cards and you just wanted a new model with more storage space, you are in luck! Eye-Fi has announced a new 16GB version of their flagship Eye-Fi Pro X2 memory card. The previous flagship wireless card had 8GB of storage. The new 16GB card has been upgraded to Class 10, while the previous 8GB model was a Class 6. For the boldly going early adopters, the card is already available for pre-order at Amazon for $100 (in frustration-free environmentally-friendlier packaging).
This is clearly a card for photographers who must have this feature. You can easily find a regular 16GB Class 10 memory card for around $10, and a 32GB Class 10 SDHC card for around $20. So they are priced for photographers who really want/need this feature and are willing to pay a premium for it.
Eye-Fi has managed to usher a lot of different Eye-Fi product sub-lines so far, requiring a couple of Google searches to sort things out. X2 is the latest line of cards, so that's a starting point when comparing.
According to the EyeFi website, the Pro X2 models allow wireless RAW upload and Wifi-based geotagging, while the Mobile X2 and Connect X2 do not. See comparison table at the bottom of this page.
Comparing the Older First Generation of Eye-Fi cards
Keep in mind, the latest generation of Eye-Fi cards are the X2 cards. The first generation, obviously, did not have an X-name, but I guess we can give them a post-hummus name of X1 [someone's hungry?].
If you are trying to sort out the older first generation models, here is an annotated screenshot crop from this Amazon product description. The 8GB Eye-Fi Pro X2 Class 6 card annotated in blue below is succeeded by the new just-announced 16GB Class 10 Pro X2 which becomes the new flagship (not in the chart below).