There isn't one, unfortunately. Don't really know why either. There are a few spots that could be good locations for it, although I haven't had one apart to check the internal frame, if there even is one.
Wirelessly posted (Apple Communication Device: Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A102 Safari/419.3)
Wirelessly posted (Apple Communication Device: Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A102 Safari/419.3)
Oh, and sometimes when the bathroom is a little chilly, the laptop serves as a nice lap warmer. I often find myself in the bathroom for extended periods of time with my laptop.