i downloaded the beta a few months back but no plug ins worked so i went back to safari 2 that day. well when i went to 10.4.11 i got safari 3 automagically placed in my apps folder instead of safari 2. So here are my thoughts
1. acidsearch wouldnt load. i had to reinstall it. now it has contextual menu items too, bonus!!!!2. contextual menu items in safari have changed. now you can “inspect element” which brings up a box almost useless to anyone but a  web design guy, so ya know i like it!!!3. its faster. on cached pages especially! way faster then!4. surfrabbit and saft still work, whew.5. it seems you can now bookmark all tabs open in one window. first time i think i have seen that. bonus!!6. the debug menu changed a bit ,open page with is now at the  top where it should be  yahoo baby!7. saft or safari added a few cool things to the history menu, open last closed window and open all window from last session i think it was saft or surfrabbit. `~~KM