MapBlast
(Similar to MapQuest but
allows you to add icon points - their positions can be extracted
from the resulting URL and used as reference points - one user has
also suggested that you may also like to look at the VBS script on
this
page)
MapQuest (A truly excellent resource capable of
producing maps up to 999x999 pixels down to street level)
Digital
Chart of the World (The
tools available here are excellent for anyone wishing to create
their own maps)