Pie Charts label size feature

I'm tinkering a bit with all of the various drupal charting modules right now, and well, to be honest, Open flash chart seems to be the way to go.. :)

A huge part of my needs is going to be regurgitating various data in charts that look alot a like, so I decided to whip up little wrappers for my own use (yes, I know, a wrappers, around your API.. the levels of fun..)

Anyway, I have something such as:

function my_util_chart_pie($opts){
// My wrapper, function to make line charts a bit easier to manage in code..
// Build an array (passed here as $opts), containing all the various data/title/labels/etc
// and this does the rest.

$g = new open_flash_chart_api();
$g->set_title($opts['#title'], '{font-size: 14px; color: #ffffff}' );
if ($opts['#width']){ $g->set_width($opts['#width']); } else { $g->set_width(400); }
if ($opts['#height']){ $g->set_height($opts['#height']); } else { $g->set_height(200); }
$g->set_bg_colour('#2b477c');
$g->pie(75,'#ffffff','#6699cc');
$g->pie_values($opts['#values'],$opts['#labels'],$opts['#links']);
$g->pie_slice_colours($opts['#colors']);

return $g->render();
}

I've already done a few bar charts using a similar function, and that one works great. The problem I have with pie charts is, I cant seem to figure out how to set the font size for the labels that are passed as part of $g->pie_values. My pie charts all have very little teeny tiny labels in black text. :(

Attached is an example. The labels ("Past Due" and "Open") are there, but veeeery small and black.. I can't figure out how to change that (adjusting the size of the graph makes no difference).

I'm assuming there's a way to do this, but I'm not finding it in any of the documention, and the open flash docs just confuse me further when I try to look to them for guidance... :)