One of the biggest problems with blogger is that it doesn't allow you to password protect your posts. Fortunately someone came out with a way to do so. To read more and find out how to do it, go here. Pretty nifty, but I am now trying to find out a way to not show the encrypted text. The password for this post is "indianstallion".
Please go to http://www.vincentcheung.ca/jsencryption/instructions.html to see how to do this.
EDIT: This is an ancient post and doesn't seem to work anymore.