I signed up for Clear on Monday and have been using it without complaint since. So far I'm really liking it. My connection speed is the one that is $30/month, it's pretty fast. I haven't tried downloading anything yet, but youtube streams and generally surfing seem to be going well.
The website is, I believe just http://www.clear.com. From there you can put in your address and see if you'd have coverage. I talked with a Clear rep at Best Buy when I was signing up for it and getting my modem, they are setting up and activating towers all over town. There are parts of Portland that don't have coverage yet, but will be getting it soon.