Yes, it really is... a yoga mat wired with an internal speaker system. The Gaiam Audio Yoga Mat even comes with a downloadable yogi!
Gaiam Audio Yoga Mat
Gaiam Audio Yoga Mat - plug and play your favorite yogi
The Audio Yoga Mat is a full size, extra thick (4mm), latex-free, roll-up mat, designed with a small built-in speaker that connects to your iPod or other MP3 player. You can use it at home or take the light-weight mat on the road with you. The mat even comes with a downloadable yoga program to help you get started on your exercises.
Gaiam Audio Yoga Mat - Koi fish pattern
Of course, you can pipe in your own favorite meditation yogi. My favorite listen of this ilk is Breath Takes Mind a thorough, but understandable, book for the novice to master meditator, by Jakusho Kwong-roshi.
And there are plenty of downloadable yoga exercise instructions too. Or you may want to visit the Amazon meditation music page, where you can listen to a few bars of hundreds of meditative songs before you buy.
Oh, yes, don't forget to buy the Audio Yoga Mat....
Keeping you posted...