So PHP5 is stable and PHP4 is out of portage. Just a note to people with sites hosted off of ufies.org that I'm planning to upgrade to PHP 5.1.4 in the next while (say, by the end of the week). Please make sure your sites work with this version of PHP5 (as I understand it's pretty much compatible). Thanks.
Update Gregg of 21st Century Digital Boy points to the list of php5 incompatibilities. Thanks dude.