I was down there in Ecuador 3 years ago. There are a couple of interesting climbs with some technical ice - Antisana might be the best. The others that are commonly climbed - Chimborazo, Cotopaxi, Cayembe - are basically long, Rainier-esque glacier slogs. Boring. But, depending on your goals and experience, it's a great place to get some exposure to high-altitude. I agree that the interesting climbing is to be found in Bolivia and elsewhere.