world map data

Hi all,
Sorry if this is a dumb question.... I'm trying to produce a world map 
showing WinBUGS useage from the data collected at the mrc-bsu web-site. 
I've been trying to use the map + mapdata packages but was surprised to 
find that the geography of the world map seemed a little out-of-date, 
being specified in terms of USSR and Yugoslavia, for instance. I 
wondered if there was a more up-to-date version available somewhere??
Best wishes + many thanks for any help you can give...
Dave Lunn

Dave Lunn
MRC Biostatistics Unit,
Institute of Public Health,
University Forvie Site,
Robinson Way,
Cambridge CB2 0SR
+44 (0)1223 330394