My opinion is 100k.... make the site as big as you want but the second you reach 100k your site is too big and you need to be impletementing "on demand" movies that are loaded into the browser as the user requests it.

Get people into your site ASAP... 500k broken up over 5/6 steps is a LOT better than a 500k initial download for a 56k user.... not only that, but if someone just needs to access your site to get your email address or something, that is quite annoying to have to sit through 200-500k+ worth of download just to find out how to contact you.

- youschmuck -