Confirmed: The Kindle Fire can access three FI8918Ws with an app called IP Cam Viewer. I installed a new camera and got a new Kindle Fire and everything works as advertised. Keep in mind that the Kindle has neither a camera nor mic but will process audio, albeit softly. The only software which works effectively for sound is VLC 1.1.12 (Mac), but the quality of which the Foscam FI8918W offers has always been poor irrespective of how good one's software is. The relative positions of my 3 cameras are 30 feet with four walls separating them connected via a Linksys E3000 router in a separate building an additional 30 feet away. Surprisingly, everything works well and I am surrounded by multi-unit apartment complexes with a great many WiFi signals. Admittedly, I didn't think my setup would work as well as it does.
Accoutrements: Mac Mini 2.5GHz i5 2011, Lion 10.7.2, Foscam FI8918W (x3), System firmware 188.8.131.52, UI firmware 184.108.40.206, Linksys E3000 Router.