If you want to spread the word far and wide, Tumblr is a great resource.
If you want to send content from one blog to another, though, Tumblr isn't so great, as they recently turned off RSS importing. You can circumvent that restriction with TumblRSS as long as you're willing to set up a Webapp and restrain yourself from posting more than 100 items per day. Here's how to do it:Log on to your Tumblr account. Go to the tumblRSS page and click "Login." Click "Allow." Click "… Read more