Taking a look at the plugins that are listed there, they seem overpirced and designed for very specific user type.

For instance, the Tiffen filters. They seem to marketed for matching film-makers' effects in your photography stills. Doesn't seem to be worth it to the usual photographer if it costs MORE than Aperture itself.

Replacing background- useful if you want model shots or things of that nature, but it isn't worth the price to me as little as I'd use it.

Hemi Fisheye->Rectalinear: Once again, it's a little obsolete, especially when you consider this filter was built into photoshop years ago, and many people can get access to a rectalinear-corrected wide-angle lens.

I was hoping Aperture plugins would start offering abilities to move me away from the majority of Photoshop usage. At this point, a big chunk os PS time would be taken down if some professional noise filters were put up.

I guess we'll see in the coming months just how successful this is.

Speak for yourself, danviento. We don't all have or need Photoshop. Noise reduction and fisheye correction are both tasks that are perfectly suited to Aperture without having to use Photoshop.