Dave Duarte over daveduarte.co.za and the much famed Cerebra has started a wiki inviting people to put up any stats on media and mobile that they may have.
Now i think this is a great idea – I too have just finished a presentation on Mobile in SA and struggled to find any relevant stats. This site would have helped loads.
In the end I had to buy the stats from a website! I really think it should be free and Dave has done something about it. Well done sir – ill be adding my findings to your wiki ASAP!