Blogs are the new information place in the 21st Century.
This doesn't mean they are always useful, as they can be too varied or too limiting.

Here are some of mine and some others that are good

I have four blogs at Blogger...but it is hard to keep them all up to date.
http://tombiz.blogspot.com/ - This is my main blog now
http://sharepoint-sydney.blogspot.com/ - This is specifically about SharePoint
http://msaccess-sydney-australia.blogspot.com/ - This is specifically about Microsoft Access
http://databases-sydney.blogspot.com/ - This is specifically about Microsoft Sql Server

Scott Gutherie's blog - great for dot netters..
http://weblogs.asp.net/scottgu/default.aspx

RSS Feeds are thought of as a brilliant way to get your blogs read on a daily basis.
But at the end of the day they can be a pain...e.g. Too many rss feeds and not enough time to read them.