Amazon's been cooking something in a supposed Android-based oven for quite some rumored time. Now, an invite has gone out from the Bezos-backed company for an event on the 28th of this month at 10AM. Will the e-retailer officially announce a pair of 7- and 10-inch Kindle refreshes we've seen so much digital ink spilled over, or is this the heavily-skinned Android tab that TechCrunch got its hands-on earlier this month? We'll be there to let you know what the company's got up its e-reading sleeve.