Funny you should ask, and on this day, of all days...
I've been using Eye-Fi cards for years. For at least the last 3-4 years they have been an AWESOME, easy to use tool for getting my images online. The card automatically uploads images to a computer after you shoot. No other intervention is required on your part. Even better, the Eye-FI Center program used to automatically upload those images to any of several hosting sites like Picassa or Smugmug.
Until today.
About a month ago, out of the blue, Eye-Fi sent out an email stating that on September 9th they would discontinue all support for uploading to these sites through the Eye-FI Center program. They were only going to support their newer cards from today forward. I wrote them and asked why, and their response was that they didn't want to support all the API's they had been. So they discontinued all support for their older cards.
Thanks, Eye-Fi. Nothing like giving your customers the shaft.
I also have a newer Toshiba Air card, as a consequence. It works fine but isn't as convenient as Eye-Fi's system was.