PHP 5.5.11 has been released, but we are going to wait another day to see if an updated 5.4 version is released before building the new version on all of the servers.
5.4.33 and 5.5.17 have been released and will be made available to Plesk servers within the next 24 hours.
The cPanel server typically takes a week or more as those are provided by CloudLinux alt-php.
5.4.34 and 5.5.18 have been released and will be installed within a few days.
5.6.2 will be available on the cPanel (NYC) server within one week.