Download and Install Opera Mobile 10 for Nokia N900
Of course, since this isn’t an officially supported release it may be rough around the edges. As such, it contains several known issues. Some of the biggies are:
No support for Adobe Flash or other plugins.
No power management support (don’t have Opera running in the background unless you want to drain your battery).
Opera Mobile is amongst the best mobile browsers available in the market. Opera Mobile 10 for Maemo includes Opera Link (Bookmarks and Profile sync), Opera Turbo (web browsing accelerator), speed dial, find-in-page and other awesome features you have come to expect from Opera Mobile. And oh yeah, it is fast!
Although this is currently an unofficial release, I am sure that if there is enough interest, Opera Software will put their weight behind it. If I am not mistaken Opera Mini iPhone also started as an individual effort to port Opera Mobile to the iPhone.