Until recently, cellphone cameras were essentially worthless for taking pictures that could be viewed on anything but other cellphones. Now, however, most smartphone companies have continued to push the resolution and improve optics quality. Massachusets-based startup Youbiq has introduced a new accessory, the Gymbl, that aims to improve casual photography with the iPhone 4. MacNN took a closer look at the system, which is on display this week at the Macworld Expo.