[BioC] Display Chromosome-bands in a plot

[Benjamin Otto]

Hi,

is there some existing function which can use the biomart gene band
information for creating chromosome plots? I've got amplification and
deletion frequencies for certain genes. What I would like to do is 

1. get the $band info for a list of genes using biomart
2. make a plot for each chromosome which displays the amplification
frequencies of the genes as barplot matched to a nice chromosome picture
exhibiting the bands. (basically similar to the following picture
http://www.biomedcentral.com/1471-2105/5/13/figure/F5)

regards,

Benjamin