I never liked saying "AVI" as a word, and don't really hear a lot of other people call it "avee" or anything similar so I never really did. I couldn't find a nice way to pronounce it - there's too many ways - it's not as defined as pronouncing other acronyms like GIF or MPEG where there's really only one way of pronouncing them (in English anyway).
------------------------ ///MZOOM John 02 530i Sport Alpine White 04 Mini Cooper S JCW - what a fun car! Gone but not forgotten and still rolling strong: 97 M3 Sedan Cosmos Black 99 M Coupe Cosmos Black - sold to a spoiled brat - sorry M Coupe 98 M3 Sedan Techno Violet 99 M