Are there wireless firewire external hard disks?
There is nothing such as a wireless firewire. Firewire is used to connect a device. It is somewhat like USB except a little faster transfer rate. There are usb external hard disks as well as firewire external hard disks. They both need a cable to connect them to the computer. If you want a wireless hard disk, then you should look into a network attached storage (NAS) drive. These can be connected to your network router, and then from there if you have a wireless router, then you can access the drive wireless. One example of this is the Western Digital Mybook World edition or the Buffalo linkstation.