Wix, a top provider of web site development tools/templates and hosting services for consumers and small businesses, has confidentially filed for an IPO - Globes claims the Israel-based company is looking to raise $75M at a $400M valuation. Wix claims 31.5M sites have been built using its tools, generates revenue by selling premium plans that offer features such as extra storage and bandwidth. The company launched an app market and mobile-friendly HTML5 tools last year.