Opera Mini is currently the number one iPhone app in the 22 featured Apple App Stores including US,UK, Canada, France, Germany, Denmark etc. Good Going Opera.
For your information, Skyfire iPhone app took 2 days to pass 1 million downloads and PayPal iPhone app took 3 weeks for 1 million downloads in the recent times.

Some of the features of Opera iPhone App are
- Experience fast and cost-effective Web browsing experience.
- Powerful servers compress the data upto 90% and hence page loads very fast
- Speed Dial gets you to your favorite Web sites with a single tap.
- An address field with auto-completion means you type less.
- Tabs allow for multitasking with several Web pages.
- Bookmarks can be easily managed and accessed.
- Easily synchronize data between your phone and computer.