Thanks Saverino & John, (just like John said),i picked that one up pretty quickly - but that one only does full screen zoom (even when the safari window is selected)
ideally i'd like to keep my 'desktop' zoom at 100% so i can see my surrounding windows, but have the page or forum i'm looking at within safari be at a specific zoom level)
like on iphone's safari when i view this page, i can double-tap zoom to the width of these comment boxes/forum posts and skip looking at grey-area to the sides of the forum

thx again!