[BioC] Reading GTFs

[Steve Lianoglou]

Hi,

I'm wondering why I can't seem to stumble across any packages that  
deal with parsing and mapping GTF annotation data.

In order to do some analysis with tiling array data, I need to  
incorporate annotation data for chromosome positions, which I've  
downloaded as a GTF (along with the latest genome release) from ensembl:
http://www.ensembl.org/info/downloads/ftp_site.html

I'm happy to whip up some rigged method of doing this myself, but I  
feel like others must be doing the same thing and I'm reinventing the  
wheel which might not be all that round by the time I'm done with it.

Are there better ways to deal with genome annotation? I mentioned the  
AnnotationDbi in the subject line, because I feel like it provides  
something similar, but I don't think it's quite what I'm after.

Thanks in advance,
-steve