[mrob]

This is one reason I'd like to see a fully Open Source hardware+firmware optical drive. Probably best to start with CD-ROM, but DVD might also be possible. The optical and mechanical parts seem relatively simple, especially when you're not optimizing for minimum cost or minimum size (meaning you could use the original Philips-style swing-arm mechanism). From what I can tell, the most complicated part is the signal processing, and with modern hardware that looks practical to do in software. I'm not sure how far you could get with home-scale DIY construction, but CDs worked with late 70s technology, so at least that far should be possible.