practical to autoload libraries like this?

[eluser]wiredesignz[/eluser]
You could try something like this. Just be sure to check how often it is being triggered unnecessarily.

Code:

function __get($name)
{
    $name = ucfirst(strtolower($name));

    if(is_file(BASEPATH.'libraries/'.$name.EXT) OR is_file(APPPATH.'libraries/'.$name.EXT)) {
        $this->load->library($name);
    }
}