To further answer the regularly asked question "How do I let my friends know when my blog is updated?", we have FeedBurner, which will provide a neat subscription form for your blog, and helps you maintain your subscription list, for any publicly accessible blog which publishes a feed.
Once you setup a FeedBurner feed for your blog, go to "Publicize" - "Email Subscriptions" in FeedBurner.
You can have a form embedded in the blog page, or a you can have a link to a FeedBurner page where the form is hosted. The "Email Subscriptions" wizard will give you the code for either. Be sure to select "Blogger" in the "Use as a widget in" pulldown list.
Alternately, using the Blogger Layout "Add a Gadget" wizard, you can add a "Follow by Email" gadget - which will create a FeedBurner EMail gadget, and create a FeedBurner feed from the blog posts feed, in one easy step.
Once you have subscribers, you can maintain the subscriber population using "Email Subscriptions", from the FeedBurner dashboard for the feed, under the "Publicize" tab.
Using "View Subscriber Details", you can export the subscriber inventory to a spreadsheet, for detailed analysis - or examine the list directly, in the FeedBurner wizard. Again, your choice.
Using "Delivery Options", you can tune the delivery of the posts. Here, you can time the delivery to any 2-hour delivery window, to suit your reader population.
That's just 2 of the 4 "Email Subscriptions" options. Check out the entire wizard, when you wish.
The alternate solution for email subscription, which uses BlogSend and Google Groups, requires you to do the work of adding each subscriber to the list. With a FeedBurner Email Subscription service, your readers can add themselves, at their convenience.
You practically have a turnkey newsletter distribution system, right there at your fingertips. For the right price, too. All that you have to do is write the blog content.
Note that, with very little additional work, you can setup an email subscription for any blog or website, again using FeedBurner. And note the different feeds, published by your blog. You can make a FeedBurner feed from any blog feed, and email distribution can be used for any feed.
You may wish to read more graphic instructions from Roberto: Email Subscription to a Feedburner Feed.