Rails - Jul 2006 - Access session data from observer

I am writing an internal time tracking app, and am curious to know if 
it''s possible to access the session data from an observer.  Each
''user''
has a list of their current projects, which is updated (via an observer) 
everytime a ''project'' or ''hour'' is saved. 
To find out who the current
user is, I am trying to do a User.find(session[:user_id]) but receiving 
a ''session is undefined'' error message.

To this end, I am wondering if
a) it''s possible to access session data from the observer; or
b) there''s a better way to do this?

Thanks

Phil

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> a) it''s possible to access session data from the observer; or
have a look at: ActionController::Integration::Session - the RDOC talks 
abt how to ''mimic multiple simultaneous users interacting with your 
system''

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