Folks sent me various reasons for the current string of problems. Several Denial of Service attacks in progress, which apparently affected several connections between networks. I've gotten conflicting stories from the providers on either side of those connections. GTEI/BBN made a BGP configuration error, messing up backbone routes for about 25 minutes. AT&T had a problem with ATM software, and is currently backing it out of their switches. I'm extremely confused by AGNS, ALS, and Worldnet descriptions of the problem. Whether it is a single problem affecting all of them or different problems. Mindspring had some kind of DNS problem, with the usual results. PSI had power and facility outages in different locations.