FEEDblitz offers a great free service: email subscriptions to your blog. For example, the majority of readers of this blog, I suspect, do not have a news aggregator, or are simply not allowed by their Department o Agency to install one. In such cases, you will find in the menu on your right, at the bottom, two email subscription services: one for the posts and one for the comments.
So, in short, especially for my Information Management Leadership Initiative (IMLI) friends, have no fear; if no news aggregator is available to you, fire away your email and you'll be regularly updated!