The weight limit is different depending on how the Spinpod is mounted. When mounted horizontally (panning) the Spinpod is capable of handling a lighter weight DSLR but it generally isn't practical. This is both due to its weight and size. When mounted vertically (tilting) the Spinpod can only handle a limited amount of weight. This is sufficient for smart phones and GoPro's without their water proof case.
We should mention that all of our tests have been done with our 3D printed prototypes. The production run of the Spinpod will be injection molded. This will definitely cut down on friction and should increase the weight capacity in both mounting orientations.
We will do some tests with actual weights and post the results in the FAQ section.
Some of our reward tiers ($74, $145, $175) include a landscape mount. This is because we want to make it as convenient as possible for our backers to get everything they might need with their Spinpod pledge. If you aren't sure you want or need a landscape mount don't worry, you can increase your pledge by $15 any time to include one or you can buy one later on through http://iStabilizer.com or on Amazon. The iStabilizer landscape mount has been our go-to mount for everything from iPhones to GoPros.
A GoPro tripod mount (http://gopro.com/camera-mounts/tripod-mount) is needed for mounting the GoPro on the Spinpod. You can buy this tripod mount from GoPro's official website or Amazon. You can also check out the 'mounting option' on our Kickstarter page for some instructions.