[BioC] network (interaction) data repositories for bioc?

[Paul Shannon]

I use a lot of interaction data, assembled from hither and yon and  
usually
on an ad hoc basis -- ranging from kinate-substrate relationships in  
yeast
to human protein-protein interactions from pulldown experiments.
Perhaps other do the same, which might mean there's a lot of duplicated
effort in this area.

I wonder: is there any bioc effort to collect, curate and organize  
networks?  I found
the ppiData in bioc ExperimentData; perhaps that project could be  
extended?
Or alternatively, the PSI-MI (The Molecular Interaction XML format  
from the Human Proteome
Organization) might suggest good minimal data structures.

Does bioc have anything like this going on right now?

Cheers,

  - Paul