I just heard of these things and am already loving mine. It's like a little placemat for your morning coffee or tea.
Erin at Two More Seconds is all about mug rugs this week. Check out all the mug rug craizeeness at http://www.twomoreseconds.com/p/mug-rug-madness.html
Heres a pic of mine, I used Fresh Flowers by Deb Strain for Moda. It adds a little sunshine to my mornings :)