Those banners look really good, Klaus!
However, I do think the fade-in and fade-out effects for the texts are way too slow. Since they are adverts on the side of another page, they should be a lot faster. I doubt people will continue to look at them for much longer to just see what's it going to write up next.
By making the fades faster you can make the animation shorter and to shrink the image size even more, thus making them load faster! And also, by making them load faster, they will show up earlier, maybe even just before a user goes off the site! No point having the advert if a potential client isn't around long enough to see it, is there?
Thought to point that out. It's just something I have found out about people and their relation to web ads and user interfaces in general. The world of web adverts especially, is all about efficiency.