[BioC] affy Yeast 2.0 annotation

[Jacob Michaelson]

I'm having difficulty finding a reasonable way to format the annotation 
data that Affymetrix provides (both MAGE-ML XML and a similar CSV file) 
into a BioC annotation package.

I've read the AnnBuilder vignette and it seems to assume that one 
starts with a format other than what Affy provides.  I've also read 
that the RMAGE-ML package can take the Affy MAGE-ML package and format 
it for use within limma, and a few other packages, but affy (or annaffy 
or AnnBuilder) isn't listed as one of them.

Can anyone help me out as to what method would be most efficient for 
formatting this MAGE-ML file into a format acceptable for use within 
BioC as a general annotation file?  I can't find any such packages 
currently available for the Yeast 2.0 chip.

Thanks in advance,

Jake Michaelson