As mentioned by Elizabeth Naramore on the php|architect website today, the XAMPP project has released a new version of their software to automagically install Apache, MySQL, PHP and Perl.

From ApacheFriends.org:

In all versions we updated Apache to 2.2.6, PHP to 5.2.4 and phpMyAdmin to 2.11.1. (Find more details on the specific download page.) I'm sorry to say, but under Windows we currently have problems with the new Apache and mod_perl, which doesn't work at all. We hope to find a solution soon.

Links to download the version for your OS of choice (Windows, OS X, Linux, Solaris) can be found on this page of the project's website.