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Popular mobile browser provider Opera released a demographic report about their users today that provides some valuable, if sometimes unsurprising, insights into just who is accessing the web on their mobile phones. The two primary take-aways: 88.1% of people using the mobile Web around the world are male and most people using Opera Mini are between the ages of 18-27

Those big conclusions may be relatively unsurprising but the study also includes a number of other tidbits that might be news to you, as they were to us. It's a really interesting snapshot of different cultural contexts and technology use patterns.

The popular mobile browser Opera today launched a software developers kit (SDK) for widgets. While rival Apple's iPhone SDK requires that applications be distributed exclusively through the still-unlaunched iPhone App Store, pay a $99 application fee and wait - Opera SDK built widgets appear to be much more open and free.

Opera's widgets will be able to run on the company's wildly popular mobile browser, Opera Mini excluded, the desktop version of Opera, the Nintendo Wii and any other devices that run Opera 9.5. We covered the launch of 9.5 here.

Today, Opera released a new version of their mobile web browser, Opera Mini. This latest version, Opera Mini 4.1 beta preview, offers some new features, but most notably, it claims to be 50% faster than Opera Mini 4.0 when it first launched in November of 2007. For the 40 million users who are currently using the mobile browser, this is welcome news, since one of Opera Mini's previous weaknesses was speed.

Starting on the first of next month, the widely popular mobile browser Opera will switch from offering Yahoo! to using Google as its default search engine. While Yahoo! has its own relatively sophisticated mobile offerings, the company can't be happy to lose Opera to Google. Update: Yahoo! emailed to tell us that "Yahoo! has elected not to continue its mobile search partnership with Opera at this time." Interesting!

Presumably there's some money changing hands and we can't help but wonder how much. It's Google's payment to Mozilla for being the default search engine in Firefox that makes that browser financially viable.

Opera has just unveiled the newest version of its mobile web browser: Opera Mobile 9.5.  The software, which will be officially previewed at next week's Mobile World Congress in Barcelona, introduces several enhancements to the prior version including faster speeds, a re-designed UI, and Opera Widgets. The Opera Mobile upgrade will be available for the major mobile operating systems (Symbian, Windows Mobile, and Linux) as both a standalone browser and as a software development kit.

Last October, Mozilla announced that they were working on a mobile version of the Firefox browser. As it turns out, they were working on two versions: one designed for touchscreen devices like the iPhone and another for traditional phones. Now Mozilla has finally given us a glimpse of their designs by posting the plans, mockups, and details of these two upcoming mobile browsers on the Mozilla wiki.