The AvantGo Client does not currently support image maps. You can simulate them, however, by splitting your image into sections and assigning a different anchor to each one. This way, you can have horizontal navigation bars that act just like their image map equivalents. Just remember to keep your images small and simple. Also, keep in mind that the image should give the user some indication of its function. Remember that you do not have the benefit of the cursor turning into a hand when it is over a link.