Interesting Critters in my Back Yard: Tarantulas
I saw this fairly large one - about five inches in length - in my back yard yesterday, so I took it as a opportunity to whip out the iPhone and snag a pic. It's really not common to see them out in the mid-day sun, so this one must have been on a pretty important mission.
Don't worry, she's not going to hurt you. In fact, she doesn't want any more to do with you than you want to do with her.