Previously, I posted directions for keeping Wordpress installations up-to-date using Subversion. Unfortunately, as of this writing (two-days post release), the Wordpress developers have not yet created a tag for the recent 1.5.2 release, thereby breaking the previous instructions.
Fortunately, rather than tracking the releases tag by tag (version by version), one can simply track a branch, in this case, the version 1.5 branch.
To do so, simply use the following:
$ cd $WORDPRESS_DIR$ svn switch \
This method may, in the long run actually be easier, as it will (should) track all releases until the next dot release becomes available. Of course, depending on how often one updates, one may get some development code in the process.