BBC television programs became available for downloading from Apple's iTunes website in the U.K. today (Wednesday), priced at nearly $4.00 per episode -- or nearly twice what Apple charges in the U.S. to download an American TV show. The shows can be viewed on PCs or Macs as they are being downloaded or viewed later on a video iPod or iPhone (although immediate viewing via the iPhone is expected to be added in March or April). On Monday the BBC said that its own iPlayer had become a surprise hit, with more than 500,000 downloads occurring each day. For some shows, it noted, online viewing already represents 10 percent of the total audience.