“private” posts accessible by IP?

I am wondering if there is a way I can accomplish something similar to a trick I was using on my MT blog…
I would like to designate certain entries “private”, and I do not want them to show up on the page anywhere unless you have a certain IP address.
Really, I just want to be able to be the only one who can see them, and for everyone else they simply aren’t there.
Searched but didn’t really see anything like this. Any ideas?