Asa, nici in romaneste nu exista regula, des invocata de nechemati, de a nu folosi virgula inainte si dupa "si" sau "sau".
In "The Elements of Style" (carte de capatai, ca altfel n-o citam), William Strunk zice asa:
QUOTE
In a series of three or more terms with a single conjunction, use a comma after each term except the last.
Thus write,
red, white, and blue gold, silver, or copper
He opened the letter, read it, and made a note of its contents.
Profesorul care m-a facut sa ma intreb despre chestia asta ma zgarie pe ochi punand virgula inainte de "etc", si e profesor de stil si tehnica a scrisului.