This soon after Aperture 3's release, I'd expect support for new cameras to happen sooner rather than later.
The problem is that the manufacturers
do not work with the software companies (not Apple, not Adobe) to provide RAW specifications for all their cameras. In fact, some manufacturers go so far as to
encrypt portions of a camera's raw iamge files so that you are locked into using their provided, specific software.
Most raw support for nikon and canon cameras ends up being the result of reverse-engineering. Adobe has had to do this for most of the EOS cameras when they come out. The same will be true for Apple.
I feel your pain. I have a T2i as well, and before my T1i was stolen, I had to wait when I first got
it for about 2 months for camera raw support to be released.
Fortunately, my workflow is Adobe based, so Camera Raw 5.7 RC is working fine for me now and I immediately convert all my stuff to DNG.