In an interview with Nintendo's Miyamoto Shigeru in the latest issue of the Japanese gaming magazine Dengekioh, he mentions that he is currently in the planning process for the development of a Zelda title for the Game Boy Advance. While Miyamoto has previously hinted that a Zelda title for the GBA is a distinct possibility, this seems to be the first confirmation that one will really appear.
The Game Boy Advance is Nintendo's next-generation portable game system, scheduled for a release in August 2000 in Japan.