There's no known way syntax for table layout that works equally well for novices and experts. So, why not encourage authors to upload any tabular information as a file? Then one of our vast programming staff can convert it.
Many computer users are familiar with creating tables (A) in Word or Excel; or (B) ASCII tab-delimited or comma-delimited format.
If we make it easy for contributors, they will contribute lots of good stuff.
Ed Poor