It's safe to say that anyone who knows if and when X-Pro 1 raw support coming is under NDA.
You can send Aperture feedback and let them know that it's important to you.
FWIW, Aperture has never supported a non-Bayer camera.
If you follow rumours then you hear that Fuji and Apple are talking, but frankly those have been around for awhile with no results. For now I have cobbled together a workflow that works OK. There isn't much good news about RAW support for the Fuji X-Pro 1. I hope with the X-E1 coming out shortly and Zeiss making lenses that Apple and others see that this camera system is here to stay. Until then we just wait.
The best means of conversion that I have found so far is a command line executable called dcraw, produced by Dave Coffin. The latest version appears to be 9.16 and it supports X-Pro 1 RAF files. The conversion to 16 bit tiff with Colour profile Photo pro RGP gives a reasonable tiff file for import into Aperture.
I tried many others.
Lightroom 4.1 does a poor job
Graphic Convertor uses dcraw as a plugin. It cannot show the full size RAF file in edit mode, but can export to tiff.
Lightzone does similarly.
Silkypix is very unstable and user unfriendly and converted tiffs are not as good as jpegs direct from the camera.
Most Mac based editors rely on Apple recognising the raw format to disply it themselves so until Apple do something there is little hope of doing anything else than converting to tiff.
Adobe DNG Convertor produces DNG files which Apple does not support, because of the demosaicing problem.