Since I'm a bit hit and miss about updates to this blog, I've been trying to find a service that e-mails my readers when I do updates, and so far I like Blogarithm best. I've added a box under my profile where you can enter your e-mail and subscribe. What happens is that first Blogarithm will send you an e-mail to confirm your address, you have to reply to get added. You don't have to set up an account, but if you do all it requires is a password in addition to your e-mail address. If you have an account you can subscribe to any website and you will be notified when it updates.
Seems pretty nifty to me, I'm going to subscribe to all the blogs I read regularly.