I'm on week 3 of the Cool Running beginning runner program. I'm too embarrassed to type the name of the program here, but the bottom line is that I should be able to run 5k everyday at the end of about two months.
Right now things are going pretty good - I'm getting my breath and my legs are getting used to the running. The only minor irritation is that the ball of my right foot is a little bruised from breaking in a new pair of running shoes, but I just have to live with that for the moment. It actually only hurts when I walk - not so much when I run.