I've always sent thank you cards to the person I interviewed with either the day of or the next day. It keeps your name on their mind and makes you seem thoughtful. Just don't suck up and send a fruit basket or anything. I did a second interview once and the card was actually on the person's desk.
Was it on scented stationary? :-)
I don't think a guy can get away with 'thank-you' cards.
But, yes that is commonly recommended for just the reasons you mentioned, keeps you in their mind.
Maybe a guy could if there was a picture of a lumberjack on it and a little sawdust inside.