A NeoGAFfer named ram reports that Sega's arcade/Dreamcast fishing game Sega Bass Fishing (known in Japan by the much catchier name Get Bass) will see a 2008 release on the Wii. Apparently, rather than a new game, this will be a port of the original with new content (including changing weather conditions and 15 different locales). The very Dreamcast-like screens he posted would certainly support that conclusion. We don't know what the source is for the information or the screens, unfortunately.
Considering how well the Dreamcast fishing controller works for Wii-like tennis, we wonder if Sega will have some special insight for fishing with the Wiimote and Nunchuk.