While it's not the crown jewel of Opera's Browser offerings -- said title belongs to the as-yet unreleased Opera Mobile 9.5 -- Opera Mini 4.1 is still plenty good. We liked it when it was released in Beta and we like it now that it's a full release, with great features:
- Opera is now up to 50% faster
- Find text within a Web page
- Auto-completion of URLs
- Download and upload files
- Save pages for offline viewing
Opera Mini, sadly, is Java-based, meaning that on Windows Mobile you're going to need a Java Virtual Machine. I can't speak for all WM devices, but on my Moto Q9h it installed very cleanly and it created a shortcut on my Start Menu so I didn't have to go digging through my JVM. Opera Mini is probably the only app that makes me wish that Windows Mobile had Java more deeply integrated, otherwise you can keep it off, thanks.
Grab Opera Mini at http://www.operamini.com.