servers down

I'm trying to install apache20, which has dependencies, including apr and apr-util, and a bunch of other stuff. I was able to install all the other stuff, sudo port install expat openssl ... But when I sudo port install apr0 apr-util0, it attempts to fetch from a bunch of servers and eventually fails. Does this happen much, in peoples' experience here? When it happens, is there any workaround, such as trying a different rsync mirror or something like that? I'm guessing I just have to wait a day and try again. Thanks for any feedback.