Browser terrorists Opera Software this week showed off the latest Linux version of their eponymous Web viewer, Opera. Alas, Opera for Linux 4.0 remains in its alpha testing phase, leading the company to admit it "isn't usable as a full browser", but Opera is at least pushing ahead with its development programme. "[Development is] progressing fairly quickly, and I've been releasing when it works," said the Linux browser's lead programmer, Darren Starr, in a statement. "So far that has meant updates every 3 to 5 weeks." ® Opera for Linux 4.0a can be downloaded here