Here is a tip for Bloglines users. Bloglines allows you to create Email Subscriptions. I love using these for announce-only mailing lists, so I created a toolbar button to make creation of these email addresses easy. This button will pop-up a new window that is open to the Blogline Manage Email Subscription page that creates a new email address.
Here is the link to drag into your personal toolbar folder to do this. This works in Mozilla, but it doesn’t seem to work in Explorer. Oh well.