Whoa man, you read my mind! I'm about to open a new section in my journal entitled "Falling at the first fence", which concentrates on, yes, artistes who had one album and then either disbanded or were never heard from again.
First up is Wavelength, who had a quite big hit with "Hurry home" and then just quietly went their separate ways. Not that surprising really, as that single was about the only good thing on the album....