Ooh, in my hunt for a good scaler I did see some people working on light gun compatibility gadgets for modern TVs! No idea how well they work now, but hopefully they'll be perfected by the time the last CRT gives out.
The two big ones are the Sinden Lightgun and Gun4ir, the Sinden uses a white box at the corners of the screen and a camera in the lightgun while the Gun4ir is similar to the Wii's sensor bar. No first hand experience but the Gun4IRs seem to be pretty popular and can be DIY-ed with a guncon shell.
