A talking website! I can't think of anything worse! By all means have websites which CAN talk, but do you realise how many of your customers are likely to be browsing the internet at work? They will avoid your site in their millions!
I've hot to agree with Marissa here. I hit the back button on sites with those terrible midi files playing in the background, and sites that talk at me. If I have the sound on my computer at home it's to listen to music, and I don't want your website interrupting my enjoyment. If I'm online at work I don't want anyone to know that I am online. A talking website really does defeat the purpose.
Can you back up your statement with some case studies?
I've actually had the volume up on the computer and the playlist has ended, and a talking website starts up and I've almost jumped out of my chair! First thing I do is hit the back key, and then turn off the sound completely. I don't ever go back to the site. If you're going to scare me like that, you've lost my business already.