Ooh, Ursula, I have at least 6 big plants of Cymbidium and that's the only one showing a bloom spike so far. That plant had 3 huge spikes in bloom when I got it two years ago, and did not bloom at all last year (but I had re-potted it).
But I did get some great advice from Jim, to give them more sun in the winter, and some more hints on water and fert from a lady at the Sarasota orchid show so - next year I'm hoping to have a lot more to show on those guys.