I've visited friends at their London office a bit. Fun place, a lot like the Google campus -- e.g. free food, Star Wars statues, Segways, etc. But high-ish secu

I've visited friends at their London office a bit. Fun place, a lot like the Google campus -- e.g. free food, Star Wars statues, Segways, etc. But high-ish security; any visitor gets a printed name badge that expires and changes colour after X hours. I have no experience of their software, but the people I know who work there are very smart. Some of the best developers I've ever known. OTOH, many of the other best developers I've known refuse to work there on principle.