ill tell you a funny, in January I gave my old boss (who passionately hates technology) my text file and told him he only forgot to pay two days in the (hectic) year. (I make one txt per year) It listed what work was done and with who.
His response was WOAH, I've always wanted this! He then send the whole thing to the printer and put it on the wall in his office. Then he added arrows to the days he forgot to pay using a ballpoint pen. He talked a bit about periods in the year and used his finger as a pointing device.
It also works nicely together with calendar.txt for me. I can 'grep' trough both to see all todos and events related to a project or a +tag.