I'm not a very good photographer, but I take lots of digital pictures which is why I was interested in checking out Aperture, but I didn't want to plunk down $299. Apple has heard my silent pleas and made a 30 day 'test drive' available for all to download.
It is available in English, French, German, or Japanese. All features are enabled for 30 days, but the trial does not include the sample images that are available retail version.
At the moment the trial page isn't working for me, but I am sure Apple's trained web professionals will get that all sorted out.
Update: I was right, they fixed the page quickly. Download away.