There are, indeed, other volcanoes erupting right now worldwide other than Chaiten. Of course, when you have an eruption like Chaiten going on, it is hard to pay attention to other eruptions.
Ubinas, in Peru, has been having intermittent ash eruptions for the past few months, depositing ash on the surround communities. Apparently these eruptions have been causing some respiratory ailments to the local Peruvians due to the ash & volcanic gases. Ubinas is one of the most active volcanoes in Peru. This picture shows Ubinas erupting in 2006, as captured from the International Space Station (ISS).
Edit: Fixed "Ubinas is one of the most active volcanoes in Chile" to correctly say "Peru". Yeah, I always seem to have Chile on the brain. Darn Aucanquilcha and Chaiten! Thanks Jon!