I used the release to learn more about building my own Perl. It's pretty easy to compile your own 5.10.0 in a distinct directory (/usr/local or /opt or even $HOME/.perltests) and then make a symlink to the new Perl as /usr/bin/perl-5.10.0 (and don't forget perdoc-5.10.0).

This way, the base of my system can still count on /usr/bin/perl being the tried and true, while I can begin testing scripts on 5.10.0. Download the source (say at CPAN) and check out the INSTALL file. It's as easy as ./Compile -des -Dprefix=/path/to/mylocalperl