For my mother-in-law--wine glass markers and a bottle of wine (I have a friend who makes custom wine glass markers and beer bottle markers, including ISU ones).
For my Mom--probably an iTunes gift card. They have an iPad and don't have much on it. They are traveling overseas in June and I thought she cold put some books on there.
For me--I have plenty of ideas, but my husband has already said he has nothing yet. I've offered to get myself something, that way I know I'll like/use it.
Gift card for a spa/haircut/manicure, outdoor plants, iPod, anything to do with interests she has (cookbook if she likes to cook).
Let me just say how much my husband hates Mother's Day. You have Christmas, then 2 months later my birthday, then 2 months later Mother's Day. He hates all the pressure. And he has Father's Day near his birthday (2 years ago it was the same day) almost exactly 6 mom after Christmas. But last year he did good, he got me an iPad.