Using R map data to determine associated state for a coordinate?

Hi!

I have no idea if this is maybe an easy task utilizing
R since I read there is 
geographical map data in some package:

I have a huge number of geographical points with their
coordinates in Germany. 
Now I want to determine for each point in which
"Bundesland" = state it is located.

Can anybody tell me if this is doable relatively easy
in R and if so give me 
some hints or links how to do it?

Thanks a million,
   Werner