Your best bet is to have the dealer look at it, after all, that is what the warranty is for. In the meantime, try spraying some WD-40 on it the belt, while its running, so it can spread out throughout the entire belt, see if the noise goes away with that. I used to do that when my AC belt got noisy on my old cars.
2006 IS350 Blue Onyx|Black Interior|Navigation|18" wheels|6000K HID|Joe Z Intake|HKS Drop In Filter|Tanabe Cat Back|OEM Rear Spoiler|PIAA Superrozzas
Previous - 2002 IS300 Solar Yellow
'04 & '05 SEFL SCCA Solo II -D Stock Champion
Want to know what I think about the New IS 350/250....read about it.