Have you checked your ecas today?, mine just changed from IN PROCESS to Centralized Intake Office Sydney(CIO-S) Eligibility Review Complete. I have since received the positive eligibility letter (what we coin PER), on the 15th of Dec 2010. Surprisingly, my friend in another forum, who both had same time lines with me, has just moved ahead of me, his ecas now shows, Received By Visa Office, his VO is London. Let's keep hope alive by believing that Accra is slow. But my candid advice is that you make an effort to visit Accra, and confirm that one can actually drop off a package, without making an entry. You could find out something that may enable you to trace the package.
All the best my fellow Pa'