I had an Eye-fi a long time ago and got rid of it.
I saw Eye-Fi at CES. So this week I bought a couple of Eye-Fi Mobile 2x 8gb cards.
The card seems to work pretty well. One complaint that I have it documentation. I understand you want to make your web-site pretty and have all kinds of colorful/easy to use links.
What I really need is a document that tells what each setting does... in the web app, in the desktop eye-fi center and in the ipad app.
I don't want to have to keep searching and navigating through your web-site. It's annoying and a big turn off.