Opera Mini Beta 4 has just launched the latest version of its mobile web browsing service.
Included in the set of new features is exclusive Blackberry support, which basically offers an optimized version of its service for Blackberry users, complete with better menus and an improved user interface. There's also a new landscape mode for all users, though it's modeled after the addictive effects of rotating your iPhone. A new multi-search start page offers options for a handful of search engines in an effort to help you find things faster and more efficiently. Some custom search engines have been added as well. This mimics the PC version of Opera, and lets you customize your search engines for your own personal preferences.
Some smaller improvements include shortcut keys, collapsing menu options, support for secure connections for things like money transactions, smaller fonts, better image quality and improved cookie support. You can also edit your current URL, utilize the full screen mode, and enjoy a more web 2.0 feel.