If you like me plan to develop a series of application for all kind of mobile device, may be you will need some emulators to test out your application.
I found this web site from SUN, it contain a list of mobile emulator. Although it is not so up to date , but still worth to have a look.
And also this web site , it contain newer mobile device emulator.
If you would like to see how the opera mini work , you can try your web site at these two Opera mini online demo.