I also love Jennifer's card. It's not clear on the photo but she has created a really beautiful background giving the whole piece a peaceful day sailing.
There's been quite a bit recently about zentangles and Joni from the Surface Design swap has sent me one as her 'Technique' atc. I love the detail in this atc and feel inspired to create one for myself. Zentangles I believe are small pieces of artdoodling. Normally around 3.5" square drawn with a Micro pen onto fabric that has previously been coloured in some way. You 'doodle' a design then fill in the 'doodle' with patterning which is then coloured in too. If you want to see more of them you'll find them here. I'm so impressed with them that I've decided to join in the Zentangle Ornament swap on Surface Design, now there's a challenge.