I absolutely LOVE Pandora! It's super simple, and it does an absolutely GREAT job of picking songs based on your interests/genres, and it can find some pretty obscure music (e.g., Drums & Tuba; Intronaut) as well as the obviously obvious (e.g., Ozzy, Helmet). The Music Genome Project is a stroke of genius! But, speaking as a biologist, it's not so much a "genome" project as it is a "proteomics" project. Anyway, another super cool thing about Pandora is that it's not gonna play all the same, moldy classics you are used to over free radio; case in point, currently it is playing "Bloodstone" a freakin' awesome song by Judas Priest off the Screaming for Vengeance album, which likely never got any airplay, or maybe like a month after the album came out. Long story short, Pandora ROCKS!