PHP 4.4.9 had been released and that is the last PHP4 update we will ever see as PHP4 has reached the End-of-life (EOL) as on 8th August 2008.
PHP 5.3 will be due somewhere between mid September and mid October of 2008.
So for goodness sake, bug your lazy server administrator to upgrade to PHP5!
If your host refuses to upgrade to PHP4, ditch them and come over to FRRO. Here at FRRO, we always try our very best to keep our software as up to date as possible.