On my site I want to put a basic form that writes to the current page to update it with the new info.
Simple example:

Form question: What is your favorite color?
Once answered (let's say with 'red') then that same page reloads, this time 'red' is posted there.

This may just be incredibly simple and I'm just clueless....
I also would at some point in the future, like to have a bbs or similar on my site.... any advice on which FREE/GNU? are the best ones for a basic board....