Here is another tiny microscope that combines with your smartphone to magnify small objects. The TinyScopeCAM Smartphone Microscope has magnification up to 1000x with focusing range of up to 0.25mm. The TinyScopeCAM has a multi-function illuminator with 3 modes for viewing all kinds of samples.
The device measures 69.5mm x 56mm x 23mm. The project is now live on Kickstarter.