Go check out audioscrobbler.com. You download a plug-in for your music player (most of the good ones are supported) and register with Audioscrobbler (everything's free). Every time you connect to the internet, the id3 info of the songs you listened to are uploaded to their site (tiny amount of http traffic) and they provide you with some nice dynamic statistics, artist recommendations, forums, groups etc..
It's a honest service run by a really nice chap from England , so no worries about privacy. Check out the FAQ's for a better explanation.
Let's get the SA bands into their charts. [:)]
My username on audioscrobbler is vanmartin. Look me up if you decide to use the service or join the "South Africa" group.
Check out this link to get a feel for what the service looks like.