SSL is on the roadmap. We have made requests to Shoutcast regarding listing there and have been ignored. We will be making changes to the way the yp listing works to get listing working again in the next release.
As I cannot find any current information since 2004 here regarding this I'm wondering if it is now possible to cluster two or more Steamcast servers and access the cluster by using a single link? Master is an Icecast server.