I've attached an initial patch for eye-fi support against 1509. There's an OPT_EYEFI option to toggle support in the build.
At the moment it only adds an entry to the Misc menu allowing you to display the card info, names of configured access points, and currently detected APs. I'm gonna need a virtual keyboard before I can support configuring new APs!
Next I'll probably add support for changing the simple settings, such as transfer mode, and enabling/disabling the wifi. Also will start looking into delaying auto-poweroff while an upload is in progress. Delete-on-upload will be implemented if I can get the appropriate API information.
Note: I don't yet check if the current card is an Eye-Fi yet, so don't try the menu options on a standard card! (although the worst that will happen is it might hang waiting for a response.)