#1
I guess this could go here.
im thinking of purchasing a mandolin.
i have absolutely no knowledge of them at all.
whats some good music featuring them i oughta check out? and any other information you htink a mandolin owner should know about mandolinss
#2
BlueGrass and Folk Music have them alot.

I own an Applause acoustic/electric. mando and its a real pleasure to play.
fun for fast stuff. It will take a bit of time to get used to the fingering (GDAE backwards from a guitar). Also since its tiny I tend to overshoot intervals alot when I first started.

So if your into Bluegrass or Folkmusic Check them out they rock.

Ive jammed a bit with a rock band on it and it was fun. I personally would love to actually play mando in a band, but I would need to get a "bit" better first lol.

-Ryan

EDIT: Check out www.musicmoose.org
Free lessons that are actually usefull and you can get a few ex. of some incredible playing. Look under Mando Lessons and I would recomend watching some of the jams as well.
#3
all of zeppelins acoustics numbers have mandos in it
some off my head are

black country woman
going to california
tangerine
the battle of evermore
#4
Mandolin is mostly in bluegrass, There's a band called Nickel Creek that have amazing mandolin.

Also english/irish traditional is great for mandolin playing reels and ****e.

Mandolin is way fun, I learned to play some fast irish reels in about 2 hours of picking one up. I can play Hey Joe on mandolin too Lol
#5
I've got a Ashbury mandolin and it's nice to play, but i imagine it would be a hundred times more fun in a group setting. It's not as rewarding to play on your own as a guitar is, for me anyway.

Some nice books to buy are:

Mandolin Gold Link (UK) and Hal Leonard's Mandolin Method Link (UK). It's not too hard to find your way around if you know a bit of theory.