Now, I never have to plug my camera into my computer anymore. I just leave the camera on while at home and the images wirelessly transfer to my Flickr account. I can even use the Eye-Fi manager to watch the files being uploaded. The only thing that kind of bothers me is that the Eye-Fi Manager stores a small thumbnail of your images on the Eye-Fi servers and there is no way to clear your images off their servers. So, if you take some naked pictures of your girlfriend, you might want to switch back to a regular card.
Update: Eye-Fi fixes their system to allow you to go straight to iPhoto. Not really sure if this is a good thing for me or not. I'd rather skip iPhoto all together and just go straight to Flickr.
I bought mine from Amazon. You can click the link below to get yours!