Hi,
The Buddy List can be "Hidden"
When iChat is closed (Quit) and the Buddy list window has had the red button pressed it will remember that the next time.
First of All check that the account is Active
Two places you can do this
1) iChat Menu > Accounts (Logged in accounts should have ticks next to them)
2) iChat Menu > Preferences > Accounts > Account info tab In here the Use this Account box should be Ticked
From there any Logged in account should show in the Window Menu as well.
In the Window Menu should be a Keystroke listing for Bring the Buddy List back in to view
(if in the General Section in iChat 6 you have not Linked the Buddy Lists into one window there should be as many keystrokes listed as you have Logged in Accounts)
You can also Click and Hold the iChat Icon in the DOCK and then select the account you want to see
(This only brings the Buddy list Buddy back for this time only and it will Remember the setting at the launch time fro the next launch)
I have never seen this Orphaned message before but most likely this is a way of describing a Screen Name where the proper Status cannot be ascertained properly.
NOTE.
In Lion there is also a new setting in System Preferences > General pane that is fairly low down that is about starting any App and remembering which windows were Open.
9:56 PM Wednesday; August 3, 2011
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
G4/1GhzDual MDD (Leopard 10.5.8)
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Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images." No, Seriously