I used the Dvorak layout for about a year and a half (going back and forth between qwerty and Dvorak, touch typing on both) and found that my hands did feel better typing on the Dvorak. I "converted" an ergonomic keyboard to Dvorak.
However, as I pointed out last time this came up here, writing a letter to your grandma on the Dvorak layout is a pretty neat experience. Your hands hardly move from their "home" position when talking about the weather, what's going on at home, etc.
Typing anything we blog or discuss in IM today on Dvorak is a nightmare. Acronyms, computer terminology, and programming in Dvorak take a LOT of getting used to.
Plus the typos in IM are very difficult for others to understand. When you slip one letter in qwerty, most folks know what you mean. On Dvorak, they have no idea WTF you're typing.
I noticed that thing about the brackets too... basically, if it's not regular ol' words, Dvorak can be aggravating for the first few months.