For default I just use Strum or Marimba. But I made a bunch of them one time in Garageband for my 3GS. They're backed up somewhere but I have to locate them and put them on my 4S. Thanks for the reminder!
30 very choice seconds of Charlie Byrd & Stan Getz playing O Pato (The Duck), Jazz Samba album.
A nice ramping-up chunk of Tremolo Song (The Charlatans UK), their Between 10th and 11th album.
Some of Un Minuto Mas (Fanny Lu, featuring Nahuel Schajris) from her album Dos.
Another instrumental, a bit of Clipsofacto (Txell Sust & August Tharrats Blues Trio) - Gran Hotel Havana album.
Couldn't resist "Off the Hook" - CSS, Cansei de Ser Sexy album.
-->>> "i'm off the hook, baby." It's for when your mother in law calls.
The opening of Karibien (Air France), that Trade Winds thing.
and about five or six more. I was having a blast that day. There's a Moby one from Mothers of the Night, and Dave Matthews instrumental intro to "Dive In" and even a Willie Nelson one, that "good mornin', America, how are ya?" line from City of New Orleans.