I want PHP 5.3 and currently my version is 5.2.9.  php.net lists 5.3.2 as stable, who do I need to contact to get this done?

Note that while PHP 5.3 is considered fairly stable, it does cause a lot of problems on existing sites. As of the upcoming PHP 6.0, many obsolete functions will disappear from PHP. As of PHP 5.3, users get warning messages about these "deprecated functions". While the functions are still in PHP, the warning messages can wreak havoc with pages, particularly if they get sent out before custom HTTP headers. It was a stupid design decision by PHP to issue on-screen warnings, rather than logging them in a more subtle manner. If you know what you're doing, you can suppress these warnings with ini_set(), but most users have no idea what to do when their host upgrades to PHP 5.3 and they're faced with a deluge of messages that break their site. I would imagine that LP will hold off as long as they can before switching to 5.3, just because so many sites are not going to be ready for it.

http://us.php.net/manual/en/migration53.deprecated.php

Or the Lunarpages staff can just hide the deprecated messages by default in php.ini. So the problem can be solved by default for scripts not optimized for php 5.3 
Or they can offer on option in the cPanel and as us if we want to migrate from php 5.2 to 5.3, like it is now for php 4 to php 5.

PHP 5.3 will still break many applications (requiring modifications), but at least one major application, osCommerce 3.0, will require PHP 5.3! It would be nice if LP could make PHP 5.3 optional, much as they do to let you choose PHP 4 over the default PHP 5.2. If they can do that, why not let people select any of a number of PHP levels by manually editing their .htaccess files? I'm sure there are still sites that require PHP 4, so it would not be good to take away that option.  Eventually, PHP 5.3 will become standard issue, or perhaps there will be a PHP 5.4 that isn't so in-your-face about deprecated functions.