The satellite continues to operate now, almost 19 months mission time. We are collecting at least 2 notable pictures and hope to have them complete in the next week or so. Orbit has noticeably dropped but we continue to contact the satellite at least once a week (typically 2 or 3 times) and get useful information. My guess is about 3 - 9 months left before re-entry, but I am not the expert.
Stay tuned for an update.