Although Google’s Android mobile operating system is still in the testing stages, Opera Software says it has completed a version of the Opera Mini browser program.

Oslo, Norway-based Opera said the release is only a technical preview while the company gathers developer feedback to tweak the upcoming beta. As with previous editions, it works by passing Web content through a remote mobile conversion server.

Existing versions of Opera Mini are available to end users via download, and the new Android version is available at labs.opera.com.

There may be custom versions of Mini for Android, but that will depend on the operating system’s hardware implementation. So the new features will not be known until handset makers begin announcing Android product plans.

There already has been some customization. “We decided to use the existing Opera Mini code base (even the binary package) instead of creating a separate port, to save on resources. We created a special wrapper that translates Java ME (mostly MIDP) API calls into Android API calls,” Opera’s Chris Mills wrote in the Labs blog today. But, he added, “We still have no access to any hardware that will run Android. It is currently impossible to say how fast Opera Mini will run on real devices.”

Handset makers currently licensing Opera Mini include LG, Motorola, Nokia, Sagem, Samsung and Sony-Ericsson, officials said.