Getting USB volume serial number from inserted device on OSX

[Ned Deily]

In article 
<CAEH=cXV0DJa6CCZ4T1RvL2L1g7D_mdDF4=52vuGCM5mWT18J4Q at mail.gmail.com>,
 Sven <svenito at gmail.com> wrote:
> I am using Python 2.7 with pyobjc on Lion and NSNotification center to
> monitor any inserted USB volumes. This works fine.
[...]

Since your question really is about OS X APIs and not Python or even 
PyObjC, you're more likely to get a meaningful answer elsewhere.  Try 
StackOverflow or one of the OS X lists.

-- 
 Ned Deily,
 nad at acm.org