In all my experiences with Catholic laity and clergy, there is no movement to consider it sinful per se. Rather, although there is a lean towards not smoking in many places (since our knowledge of how harmful it can be), the overall message I've received is that moderation is the key.
As in, an occasional cigar isn't bad. Chain-smoking 2 packs of cigarettes a day, however, is greatly frowned upon.
Some, however, may consider it a sin.