IMHO, things are “that much worse these days across the board”. Dreamhost has had its share of such troubles also, as do any systems which send large amounts of mail from many users through shared servers using a single IP address or addresses.
I don’t think there is any “secret sauce” for staying off these list (and that is more true for some lists than it is for others). Dreamhost has taken some steps (that I believe are positive steps!) toward deaoing with this in that they have limited the number of outgoing emails from a user, disabled forwarding for “catch-all” alias’s, no auto-responder for catch-alls, etc. While not “secret sauce”, it does show that Dreamhost is trying to help mitigate the problem and, in addition to their continued attempts to deal with individual blacklists and service providers (AOL, Comcast, ATT, etc) leave me feeling it is "as good as it gets: at Dreamhost in this area. That said, the whole situation still sucks for us on shared email servers, no matter where we host