[BioC] Synonymous / nonSynonymous utility

[Paul Leo]

Hi 
I've got a list of novel syns/ indels etc. I would like to classify them
as Synonymous / nonSynonymous and label the amino acid change. I guess
this could be done in obvious way with  BioMart (or perhaps
rtracklayer?)

But I don't want to re-invert the wheel.. is there a library or elegant
hi-level function which someone can point me towards.  

Cheers
Paul