Not long ago I toyed around with a 3.5" mini LCD for about $26 dollars. It also worked on the GoPro HD Cameras that (at the time) lacked any LCD viewing. Now that GoPro has released their LCD BacPac there's no need for this. It definitely would have helped the guys out while shooting testing the Korean Dolly out in this video: http://cheesycam.com/test-drive-spidertrax-clone-korean-dolly/
Reader Alex writes in and decides to go about .8 inches larger from the 3.5" to the 4.3" still at the same price. This little LCD also includes settings for adjustment, but would stepping up another inch provide better color, contrast, resolution? We'll just have to wait to hear back, but Alex says it's all working out and more robust than the previous. For cameras that lack a certain angle of viewing, $26 bucks sure would help on those low rotating dollies & sliders shots for framing.