I just bought a T3i because I wasn't going to play the waiting game based on a rumour, no offense to the forum . But now the T4i is official. I purchased my T3i on 5-27 from a Las Vegas shop, B&C Camera. I know that I don't have the skill to use either camera, as it is my first DSLR. Mostly I miss the in camera HDR and night stills that my point and shoot had. The ability to combine multiple ISOs in camera, combined with DSLR quality would be amazing for night time photos and ironing out my lack of skill. I'll check if returns are still possible, but I also want to know if it's worth it. I'm new here but I really would like to know your views on it.
Don't worry about any of the in-camera stuff. Learn to use RAW and do your post processing using a mac or pc. The computer in your camera is pretty weak compared to a laptop or desktop, they can do a lot more powerful processing and that can mean cleaner and sharper images.
For me, a DSLR is about being creative, so avoid using the green box setting and learn to use AV, TV, and manual settings.
Learn to use aperture, lightroom, or the RAW processor of your choice. Its pretty common for point and shoot users to have a letdown when the purchase a DSLR, there is a lot of difference, more than expected. Put yourself in learning mode, and soon you will be doing things that you could never do before.