As Cygnett's take on the metal and rubber fixed-position tablet stand design we saw a lot of in 2010, Platform ($40) doesn't bring much new to the table: made from silver aluminum, Platform features two wide L-shaped grips to hold an iPad in place, with a gap in the middle for charging access, and rubber on all the points that might rub against the device. A hole in the back provides cable pass-through access. Because of its shape and size, Platform…