You can help by donating to the Mile High Red Cross in Aurora, Colorado. The donation page is here - you'll need to choose the Mile High branch.
The Huffington Post has an excellent slideshow of the shooting's aftermath.
The Atlantic Wire has a detailed timeline of events during and after the shooting.
The Wall Street Journal has a live stream of coverage, updated constantly.
For more information from on the ground, here's a thread on Reddit, with updates from one of the victims and a medical worker at the scene.
An account from one of the survivors, who was shot in the head.
What we know about the suspected shooter, James Holmes. He's reportedly not cooperating with police.
The youngest to die was just six years old, and the youngest victim was a 3-month-old baby, who has since been released from hospital.
In a tragic coincidence, Jessica Redfield, a young sports broadcaster from Texas, was killed in Aurora after she had previously escaped in the Toronto shooting.