iPhone Release Swamps Yahoo?

Apparently there were some problems with AT&T activation when the iPhone 3G S went on sale today. (It took about half an hour to complete when I did mine.) But what I haven’t heard anything about is that apparently the Stocks and Weather applications don’t work — I haven’t done a big survey, but two other people (who didn’t upgrade) were unable to access them. And I couldn’t on either the new or old iPhone. What both have in common is that they connect to Yahoo:

I managed to connect once, but now it’s failing again.