I'm giving a small talk soon, so I've decided I should probably have a pointer to keep things on track. However, there are too many colors available, it's overwhelming; I don't like making decisions. My thoughts: Red just isn't that cool anymore. The dot is small and not very visible by comparison (to green). I've heard that the 635nm red-orange is more visible than the longer-wavelength reds (but I haven't seen one myself) - and still cheaper than green. Also, they now also have wireless remotes with lasers built in - only available in red I'm afraid. You can change slides and control the laser with the same hand - efficient! Green is extremely visible and keeps peoples' focus right where it needs to be. Also makes me look cool. Red-Green This http://www.thinkgeek.com/gadgets/lights/657a/" from Thinkgeek is an accident waiting to happen - it has two lasers, one on each end of the pointer (like a double light-saber). Oops wrong button! There goes an eye. Yellow and Blue are overpriced and overrated. Just look at this chart http://en.wikipedia.org/wiki/Luminosity_function to see why. Gamma-ray DeathStar (tm) http://www.google.com/search?hl=en&q=death+star&btnG=Google+Search" seems like a nice complement to any powerpoint presentation. Drawbacks - gamma rays are hard to focus, the dot might be too big to be useful (anyone have experience with this?); also, I've been told humanoids don't see gamma rays that well - is this true?