Personally, on a question like this, I'd like to know;
1. WiMax (to an ISP for internet), will be be cheaper overall than an ADSL internet connection
2. Installation cost (this will most definately be WAY more expensive than ADSL)
3. Monthly costs
^ all General questions to get a 'Feel' for if it's a viable alternative connection.
[I'm saying all this since I THINK that might be the 'just of what the person is actually asking]