Dead company threads will remain dormant unless there is a compelling reason to close them. Some people may wish to refer back to them for some reason and perhaps even comment.
Centamin Egypt (CNT.AX) will be suspended from trading on the ASX at the close of business on 21/1/10. After Thursday, they will only trade on the London and Toronto Xchanges (LSE:CEY, TSX:CEE).
Anyone owning shares registered with the Australian share register will be issued with a share certificate representing their holding.
Also code chages are here but this site is good for keeping up with the progress of suspended, or in particular, shares between the time of delisting and their death: