The Olympus M.Zuiko Digital ED 17mm f/1.8 is a new lens for Micro Four Thirds cameras, and has a bright f/1.8 aperture, it gives the equivalent of 34mm in 35mm film terms. Rather surprisingly it also features focus indicators as well as aperture markings to show how much should be in focus when using the lens stopped down.
The Olympus 15mm f/8 Body Cap lens is designed to be left on the camera body instead of a body cap, and can be useful if you want to very quickly take a photo without having to change lenses. It is also available for just £79, so would make a great lens for someone with limited budget. It has a lever on the lens that either closes the lens, sets it to infinite focus, or sets it to close up focus.
Olympus 15mm f/8 Body Cap Hands-On Photos of Equipment