I've planted sedums in the Silver and Green garden, near our kitchen. It is shallow, sandy, dry soil, and the sedums tolerate it well.
Fat bumbleebees hover and then land on the thick flowers. I've seen two distinct types of bees: black and yellow honeybees, and larger, fatter, orange and black ones.
This sedum, pictured left, is called Strawberries and Cream, and the bees certainly feast on it like it's dessert. Another which provides great colour - green flowers fading to pink - is the slightly taller variety, 'Autumn Joy', pictured below.