Usability 
Huge (over 800 sites) portal of mobile friendly sites. Browse by categories, and site language. Registered users can add sites and create a personal links page. The site tracks the hits each link gets so you can sort by popularity. The screenshot shows the top 15 English sites by popularity. I was surprised at the popularity of financial sites. MobileTopSoft also has a page of Windows Mobile streaming video sites mostly news and video from around the world.