Perhaps a router problem - a router out somewhere between you and Phoenix.
When you visit any website the data is passed from the server (in this case, located in Phoenix) to up to 30 different routers as it travels across the country or the world, until it gets to your computer. There can be problems at any of those routers in the path. That's why one site may appear slow but another site be just fine (so you know it's not your ISP), or why a particular site may be slow for one person but fast for another (depending on their geographical location, one may be routed through the problem router, while the other isn't). Then of course any site can have technical problems but this one isn't, at the moment. It's at normal speed for me.
A few weeks ago there was a router out in Phoenix, one that a lot of users (but not all) are routed through to reach the site. A lot of people thought the site was down but it was completely unrelated to us, it was a problem with Qwest. Not much you can do really.