You might use an svg compatible image editor (e.g., the free Inkscape) and then use that to generate bitmaps. This will result with things nicely smoothed (antialiased). You may need to do some touchups in a bitmap editor to handle transparency.
As a start, you might use some of the public domain icons (check which license each image you use has) at: http://www.openclipart.org/ -- For information on using the ACCESS Developer Forums, or to unsubscribe, please see http://www.access-company.com/developers/forums/
