We haven't heard much from Improv Electronics since it first introduced its reflective LCD-equipped Boogie Board "writing tablet" last January, but the company's now back at CES with some new products and some new promises. The first of those is a new iPod touch case based on the same reflective or "Reflex" display technology, which allows the case to change colors without needing any power -- the company says it'll last "several years" before it finally dies out. Look for those to launch around the middle of the year for under $50, with iPhone cases expected to follow. The company's other upcoming product is a "Recorder" version of the existing Boogie Board, which we managed to chec