Yes, I just tested and had problems too. I recall former problems with broken links, but this looks different, maybe bandwith problems - especially since someone else recently reported a connectivity problem with one of the Dom2 Shepherd Scenario games hosted by Illwinter. (Can't test this right now). Or maybe many people try to verify whether the download is broken because of your post like I did so that we are currently running a denial of service attack against Illwinter ourselves...
(just kidding)
To download the maps, you might try one of the other (private) download sites linked to in the "Dom2 - Links" thread which is sticky displayed among the top posts of this forum...