Hello -
I'm plotting point locations over MapPoint maps using the numbered circle icons available in the mappoint default symbol palette. However, there are no icons diplaying numbers over 20, and for some of my maps I need to label as many as 50 unique points. Are there more numbered icons available in Mappoint? If not, can you suggest a source where I could import numbered icons at a similar size? (16x16)

You will have to create these icons yourself as 16x16 pixel bitmaps, and bring them into MapPoint as custom pushpin icons. I'm not aware of any source for icons that has these available.