OK, normally I don't point out peoples spelling or usage errors. However in the past 48 hours i have seen many posts online where different posters are using form when in fact they obviously meant to use forum.

Form can be a piece of paper where one can fill out information. Form can be a defined way or of something (dance or state of a solid object.)

A forum is a gathering of the minds usually for a political or public interest. (Thus why message boards are also called forums.) A place to share ideas. I.E. Roman Forum.