As I wrote about here, I've been playing with Opera's web server built in to their web browser. Sure enough, not only am I using Opera as a web browser more, I actually find myself using the web server portion more often. It's great to temporarily host something to say test a website before launch or to show a client how a website how it's coming without giving myself more work to create a secure area on their site to see the new site. You can make it so it won't be indexed by search engines and also password protect it. It's become a decent tool in my virtual utility belt. It may not be as cool as Batman's, but can Batman host a website from his belt?