Been getting a copy of SVN up and running today (with WebSVN too). Once I'd bothered reading the FAQ on the site (which points at the relevant sections of the book (which I own)) it was all rather easy really. (I've used CVS, RCS and SCCS in the past).
Now it's time for testing and then the dreaded documentation. If we don't all use it, it'll be useless!
PS. For RHEL users, add this to your RHN sources file and you can get svn for RHEL 3
yum subversion http://people.redhat.com/jorton/Taroon-svn/$ARCH/