You can access the app store from pretty much any phone and any mobile browser. The Opera Mobile Store's collection of mobile apps contains software for Android and BlackBerry devices as well as devices with Palm, Symbian, Windows Mobile and Java OSes. iOS and Linux-based mobile OSes are the only notable exceptions.
Apps are conveniently divided by category, or you can choose to see featured and "top" apps. The vast majority of the apps that we saw were free.
As Opera VP Mahi di Silva told The Register, "In the past, we've focused on developing the best and most widely used browser, and we're now expanding into services.
"We're creating a service for users, but we're also creating a device-agnostic app store for developers so they can not only reach the 100 million who use Opera's mobile browser but people who use any browser."
Here's an idea of what the store looks like on an Android:
The company has also launched a developer portal for mobile devs who want to publish their app to multiple platforms at once.
Cross-platform mobile development -- and more and better tools for such development -- was a key prediction of ours for 2011. It's interesting to see how various dev shops and tech companies are working to bring about a smoother, less disparate experience both to users of apps and to those who make mobile apps for more than one platform.
Give Opera's mobile store a shot, and in the comments, let us know what you think of it.