Hitting the Nerd signal

Anyone know much about Clearwire, wireless internet? I'm thinking about switching over from AT&T DSL. I'm getting fed up with AT&T DSL. The DSL connection occasionally gets dropped, then comes back up after a minute or so. The wife thinks that the DSL lines are overloaded, and AT&T doesn't care as long as people keep paying.
Clearwire has an offer out this month for $29.99 a month, guarenteed to never go up.