If they're appealing to Apple, I'd say it's because they already have such a big partnership with Apple in iOS integration. For whatever reasons the partnership was appealing, an acquisition would likewise be appealing.
Maybe, but Apple would be inclined to make it Mac / iOS only, which would be counter productive. The other non Apple stuff has had a strategic importance, iTunes for windows enabled them to sell iPods and Safari for windows helped with website compatibility. Can't see this happening.