#2--Hearts or Thumbs?

I use Pandora. I also complain about Pandora.
"I said the Beatles, Pandora! For the love of God, if I have to 'thumbs down' one more Led Zeppelin song..."

So, for this post I decided to see what LastFM was all about.
What is LastFM all about?! (you find yourself asking)

• LastFM offers free mp3 downloads on specific songs
  
• LastFM has an "Events" section that contains concert dates and discussion threads
• LastFM lets you "Shout" (yay?), watch music videos, download applications to your iPhone, enter contests, etc.

I understand the appeal of this website. As Cari wrote in the task blog, LastFM has a slightly annoying social network-y feel to it--but I'm hearing music I haven't before. Take that, Pandora.
I would like to see the difference in the ways that Pandora and LastFM categorize and relate musical styles, because the two techniques have surprisingly dissimilar outcomes.

Don't gloat yet, Corey. I'm not down with "heart"-ing things, and I don't have an iPhone.