Mac user are used to the old copy/paste one thing at a time routine, but Jumpcut might change that. It's free, open source, and incredibly easy to use, once you get the hang of it. Copy some text, and it's stored in Jumpcut's holding tank. Drop down the menu bar icon (or use a hotkey to activate a bezel view), choose which clip you want to paste, and go paste it. There are some idiosyncrasies, but those are mostly from other apps like Camino, and how they handle keyboard shortcuts or the clipboard.