It's one thing when Twitter goes limp (again). It's another when e-commerce oligarch Amazon.com can't keep it up for customers. But that's just what readers are reporting, and we've confirmed. I mean, if you're going to rule the Web, it really is best to remain virile atop your throne. Sure it means lost sales for Amazon — and for its network of affiliates — but our question is, are Web startups using the company's "cloud" services such as EC2 also experiencing problems? Update: Even an attempt to access the site via IP address instead of domain name is for naught, ruling out a simple DNS issue.