There is no way of getting a jabber user's info at the
moment, it seems. This includes even away messages.
The client should be storing the away message sent
(between the <status> tags) when the contact last sent
a presence notification, and then displaying that in
the tooltip on mouseover, and should additionally be
displaying it when the user selects "get buddy info."
Additionally, the client should be sending proper vCard
requests, parsing them, and displaying them in the "get
buddy info" dialog.