This is a good point. I was wondering about it, things have changed since I did web development back in the late 90's. Has caching changed much? When you say "screw up", is there any thing I should look to avoid doing? Maybe this is also a good time to ask, what is a reasonable size for a main page, and pages beneath it? I see some really big page sizes almost everywhere I look. Small pages seem to be the exception, not the norm these days. Isn't that the whole point of Web 2.0? To deliver near desktop like experiences, or better?