While it likely won't hold onto the (slightly dubious) title for long at the rate mini-projectors are cropping up these days, Hong Kong-based Earth Trek has nonetheless gone out and proclaimed its new 90-805R projector to be the "world's smallest" and, indeed, it is small. Measuring about 4 by 2 inches, the projector can apparently pump out a 22-inch diagonal image (no word from what distance), with an SD card slot and an A/V input provided via a 3.5 mm jack, not to mention a built-in speaker. No word on a price or release date just yet, but we'd assume they'd want to get it out relatively soon in order to beat the inevitable cellphone projector rush.