You'll need basemap 0.99 to use with matplotlib 0.98.0. With the new
basemap you'll have to use::

  from mpl_toolkits.basemap import Basemap

instead of the old::

  from matplotlib.toolkits.basemap import Basemap

basemap-0.99 downloads are available at 
http://sourceforge.net/project/showfiles.php?group_id=80706&package_id=142792&release_id=603594