I've been working on leaf and ink techniques lately, inspired by a technique described by Page McNall. I only went about halfway with her process, but got all involved with the needle carving/drawing and then of course "painting" either with paint or alcohol ink or both.
She's on Flickr
I've done several, but the most current, now in progress, are these, destined to be earrings, done on copper leaf. All are still in progress, so will no doubt be tweaked before I'm done.