@zhounder: I know the rule of the 15 seconds, I sell nothing in my website, for this if somebody thinks that don't wanna wait, that don't wait. I tested the slideshow form 56k connection to DSL, and the times are acceptable, with ADSL are a few seconds. Also I tested it with IE, Netscape and Opera. About to do what others are doing I think that it's a bad rule, IMHO
btw, I saw websites of excellent photographers but with bad design and bad navigation.