David Geffen and David Armstrong 's relationship has gone from choppy waters to smooth sailing ... at least judging by new photos from Spain, where they're lounging on his famous floating paradise. The former spouses were spotted spending time together aboard Geffen's "Rising Sun" yacht in Mallorca on Monday ... a surprising sight considering it was just two months ago that they settled their nasty divorce. In the pics, Geffen and Armstrong appear relaxed as they sit across from one another