As one of the few german musicians being able to say that they've recorded an mtv unplugged concert, indie-rock band Sportfreunde Stiller succesfully participated this year.
Generally speaking, their music is rather quiet and their lyrics are thoughtful(-romantic) but clever and funny as well! I neither know all of their albums, nor have I listened to all of their songs yet, but as far as I've done, i must say they're unexceptionally decent!
youtube-playlist: http://www.youtube.com/watch?v=PZBE_gSPrnk&feature=PlayList&p=DD3AD455243CB858&index=0
my very favorites are:
"Alles Roger"
http://www.youtube.com/watch?v=rPNVAlmzqoY
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"Der Titel vom nächsten Kapitel" -> next chapter's title
http://www.youtube.com/watch?v=ykTxcKV-vRQ
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"Lass mich nie mehr los" -> never let me go again
http://www.youtube.com/watch?v=Xy0LhVHsmzY
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"Ein Kompliment" -> a compliment
http://www.youtube.com/watch?v=WvFviP2weeA
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"1. Wahl" -> first choice
http://www.youtube.com/watch?v=y4bVCe_rChE
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"Tu nur das was dein Herz dir sagt" (plugged version) -> only do what your heart tells you
http://www.youtube.com/watch?v=g9b0Jvvif_g
and this is what has made them quite popular in 2006: http://www.youtube.com/watch?v=lCG7DRNM8zw&feature=fvst
(2010 version, as we didn't make it the last time '^^)
soccer!
keep in mind it's unplugged, makes it even calmer.
enjoy