BBC iPlayer extends existing RealPlayer-based "Radio Player" and provides streamed video clip content from BBC website. The service has been criticised for its lack of support for many PCs, browsers including Mac OS X and Linux. Now BBC started to support both Linux and Mac computer. This is great news. From the BBC press release:
From today we are pleased to announce that streaming is now available on BBC iPlayer. This means that Windows, Mac and Linux users can stream programs on iPlayer as long as their computer has the latest version of Flash. Another change is that you do not have to register or sign in any more to download programs
Please note that BBC iPlayer is currently restricted to UK ips only. However, you can watch common video and other audio without a problem.
Updated for accuracy.