OK, so this may not be an option for the lower budget racers, but I found this during my visit to the Autosport show and think it's what I'll use on my race bike this year. It seems perfect for what I need it for, i.e. analog tacho, configurable digital display including lap timing system, various gauges, and even lambda metering, all with data logging and internal accelerometer.
Cost? Close to a grand, but this is pretty good value for what you get as it includes the sending units and a loom.
Anyway, seems like another alternative to the Stacks, etc.
More info
here