No, he's right, the full version will be free from the end of March till the end of June. Here's a press release from Opera
The full article can be found hereAvailability
Nintendo is currently offering a free trial of Opera for Wii which is now available for download. The release of the final version of the Opera browser for Wii is currently scheduled for late March 2007. Opera for Wii will remain a free download until June 30, 2007. After June 30, Opera will be available for download from the Wii Shop Channel for 500 Wii points. Users who download Opera before June 30, 2007, can continue to use the browser at no cost for the lifetime of the Wii system.