Nigella,
As far as Yahoo being slow, what do you mean? do you mean it takes a long time to get the emails? Or that the web site is slow coming up?

In either case, my suggestion is to wait it out. Yahoo often gets into these periods when it is slow, or emails come in the wrong order. They eventually clear it up.

As far as the newsletter, after you filled in your name and the email, did you click the "Sign me up" button?

Another question, do you think your email provider might have a spam filter that could be thinking the newsletter is spam or junk mail?

Kitty