Two splashes pages?!
One is more than enough already. lol. The first splash page where you pick broadband/dialup the image is huge. BTW: why do you have to make a distinction at all? I have yet to see a page with text/pictures as content that really needed people to pick. In fact, I have yet to see ANY page where a pressing need to have people specify their connection speed arose, period. Write clean HTML, and keep images sane (IE: don't save everything as a maximum quality jpg, or have billions of colors in a small gif that doesn't need it, etc) and there shouldn't be a problem at all.
BTW: there is very strong contrast between your banner up top and the black background. Really have either a light or a dark background, its annoying to be undecided.
Oh, and while I'm at it, the banner is huge, it pushes alot of the content "below the fold" so to speak for no apparent reason. (IE: the banner isn't all that useful). Alot of wasted space at the very top of the page, which is semi-annoying.