Findings:

• Holly Cole Trio
• The Kingston Trio
• The Terrible Trio
• John Butler Trio
• The Unholy Trio
• Hafler Trio
• Sleepytime Gorilla Museum
• Bar-room trio squeaking on a blackboard
• Trios
• sleepytime (user)
• Omni Trio
• Alkaline Trio
• sleepytime tea
• Tin Hat Trio
• Trio
• Quitting the Nairobi Trio
• California Guitar Trio
• Romtec Trios
• The Nairobi Trio
• Galaxy Trio
• Vince Guaraldi Trio
• The Denison/Kimball Trio
• power trio
• Trios (user)
• Heroic Trio
• Esbjörn Svensson Trio
• Double Trio
• Eroica Trio
• organ trio

If you Log in you could create a "Sleepytime Trio" node. If you don't already have an account, you can register here.