New 1.3 compat. minimap is available, though install is screwy-ish.
[map]:
http://www.minecraftforum.net/viewtopic.php?f=25&t=97332&p=1456935#ZansMini
[modloader]:
http://www.minecraftforum.net/viewtopic.php?f=25&t=80246#p1223009
[install tutorial](if needed):
http://www.minecraftforum.net/viewtopic.php?f=25&t=116234