According to Jason, the Kindle Fire is a low-end device with an outdated OS. “We had to do a lot to optimize to provide the same level of functionality. Basic CSS properties were missing and it provided a unique challenge.”
I have to snicker at that; the KF is running a 2 year old version of Android on a dual core CPU. It has newer OS and a faster CPU than the laptop I'm writing on right now.
But at least Onswipe has finally moved beyond iOS. And given that Onswipe added support for the iPhone in late May, it looks like they may have worked the bugs out of the process. They've added 2 distinct devices in less than 2 months, and that gives me hope that they might expand to more tablets in the near future.
Speaking of moving on, the new Kindle Fire support also brings new opportunity for ads. Onswipe sells full-page, interstitial ads on behalf of publishers which can include include features like video, geo-location, and social sharing. According to Onswipe, these new ads perform 50 to 100 times better than traditional banner ads.