I'd like to see BioPython added as an egg. I mentioned this on IRC, but it sort of fell off. A couple of users spoke positively about having it as a dependency. 

Do any of the devs have further opinions on this? Can we add it?

Depending on BioPython would provide us with a lot of utility in the datatype/datatype conversion area. I'm, personally, interested in adding/expanding all of the datatypes from SeqIO (e.g. EMBL/GenBank/etc) and AlignIO (Stockholm/clustal/etc), and leveraging BioPython for format conversion there.

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