I couldn't care less about this technology. I want memory cards that are from a reputable manufacturer, class 10 or better and a good price. None of this is offered by this Eye-Fi nonsense.

I suspect that it's more than likely that Eyefi simply haven't tested and certified them rather than that they won't work. In the litigious USA it's far better to say NO than maybe because maybe is always interpreted as yes by somebody with a lawyer.
Having said that why would you want one in an X10 anyway and have you actually tried one?

This forum is dangerous. I didn't even know this technology existed 5 minutes ago, and I am willing to sacrifice a chicken to get this compatible with the Fuji x10. :) This would be so awesome to have for my needs.

Is it for real? It looks very smokeware, like the digital film of old...

Anyway, I'm sure it would be slow and pump the battery excessively.

yes, eye-fi has been around for years. They say that the cards are incompatible with any camera they haven't tested extensively. This doesn't mean the cards ARE incompatible. I used one on a pentax K5 with no problems when Eye-Fi's site said it was incompatible and for the X100 I didn't even bother to check the website, I just popped the card in the camera and it works.

With some initial setup (which is not the most user friendly software setup I have ever seen) you can get it to send pictures from the camera to any device within the range of the same wifi network (computer, apple or android phones or tablets). With mobile wifi devices you can send photos direct to device, without needing to be on a wi-fi network at all. If your device has internet, it can then upload the photos to an online service of your choice.

As opposed to clunky camera kits or inserting your SD card (good luck finding an android or apple tablet/phone that can take a full size SD card), imagine shooting and being able to see the pictures almost instantaneously on your tablet/phone's large screen. Or if you're at home, on your TV.

Most Eye-Fi cards only transfer JPEG. I imagine that the one model that can transfer RAW does that quite slowly. But it shouldn't be too difficult to design a workflow where you can see your jpeg's instantly then save the raw files for backup and potential future processing/print, etc.

With modern smartphones and tablets with large screens, eye-fi is a no-brainer (not to mention some people's need to "social network"...). Samsung is already building cameras with wifi on board; I suppose it is one of the trends of the future.

I understand it has its uses, but popping out a CF card and sliding it into my macbook pro or were I to get an iPad camera connection kit and using that isn't really a chore.
built in 3g and auto upload to dropbox would be pretty good but I can generally wait a few days to grab photos into Aperture.

Eye-Fi is best when a client is expecting work immediately for review, or to post directly onto a website dedicated to provide up-to-the-minute coverage of an event, or concert and so on. In other words, Eye-Fi is designed to transfer off-site, away from the computer, not as the novel convenience that most of your here are discussing. FYI.

So how do send image from camera on the street via Eyefi? Eyefi needs wifi. Do you link eyefi card to you phone then use phone to send a picture to your desk?

The eye-fi worked fine with the x10. Had to disconnect my phone from my home network so it was able to grab the signal from the card. Even though the paper gives me great dslr gear to work with, I still carry the x10 on most assignments and two days ago the little guy had his first front page picture.