splash screens are in for the arts: bands, artists, media companies, etc tend to use them. They're basically just to set the mood for the website. They can be terribly annoying if not done right. I actually like the stonehenge one, the size is perfect, a little piece of pop-art... it's more like the logo on a t-shirt this way. and the font is good. At any rate, i think it comes down to the purpose of the site-- if it's really recreational, or artistic, it might work; if not, you might want to think it through.
paul