Assuming the licensing issues will be worked out, then there are a couple of tasks that someone with time (as in not me) could take a stab at. The first isn't that hard, not really sure why it isn't done yet other than you'd have no where to put it because it would be illegal!
FOAF updates: Trust rankings are now exported, making the data available to other users and websites. An external FOAF URI has been added, allowing users to link to an additional FOAF file.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!