I've never known exactly what this plant is; it was sold as Aloe harlana, but from what I read on-line, it probably isn't. The leaves aren't as wide on mine as most of the photos at davesgarden.com, and the flowers on everybody else's seem a lot darker orange, and more solid-colored than striped.
On the other hand, we have to make allowances for the fact that mine's being grown indoors without quite enough light (probably), and that can make a lot of plants look funny.
Whatever it is, this is the first time it's bloomed, so I have one more piece of information towards an ID. Maybe someday we'll know.