25 days and 2 hours. I'm in the process of trying to take stuff I don't listen to that much off the computer so to save space though.
Somethinger #XX100
248 items, 16.3 hours. . . . I realize it's not much compared to the rest of y'all, but I imagine my ultimate collection, when it's finalized (if it's finalized) will be much longer—there are at least nine hundred—and counting!—more songs I want, so. Um. It'll be at least a few days long then. 
Looking at iTunes, I see that my family's music collection (songs belonging to my parents, my brother and I), I see that there are a total of 1496 songs which would take 4 days to play. Mm. I have to look through that sometime, I think—my brother has a lot of Smash Bros. music I like. 
Don't know how long it is, but it's size is 23.2 GB.
"Wax on, wax off..." "But Mr. Miyagi, I don't see how this is helping me do Karate..." "Pubic hair is weakness, Daniel-san!"
Soul of Antimatter
13 days, 2 hours, 26 minutes. 4787 songs, 34.09 GB.
I think I know what you're all trying to say: we need to build a space helicopter!
The Musical Otaku
...6 hours. It's still growing, however, so I'm using that as my excuse.
Proud winner of Na No Wri Mo 2010!
Sen
I have no idea how long it would take (I'm afraid of Winamp crashing if I try loading everything - happened once), but it's at 134 GB right now.
Probably should get working on that essay now...
Only Sane Fox
I have no idea what the playtime totals (both Winamp and XM Play crash when trying to come up with a total), but the Audio branch of my directory tree totals 39.5GB across 51,364 files. Considering how many of those files are tracker modules or MIDI files, I wouldn't be surprised if the total was over a year.
Accidental mistakes are forgivable, intentional ones are not.
Like a fox
Hrm, 22548 tracks of short punk songs will take just about 42 days apparently.
49.1 GB, 19 days and an hour. 2.9% of library is FLAC, though.
I also didn't listen to all of it.
edited 24th Aug '10 2:24:58 AM by Litis
ヽ(´∀`)ノ
18 days, though I own some CDs that aren't on there.
It's about 40 GBs, and I try to keep it from growing too much larger than that.
edited 24th Aug '10 2:38:35 AM by IronyAdams
Like the night my girl went away, gone off in a world filled with stuff
4106 items, 10.1 days, 21.25 GB
Oh My
Mine is...1563 songs, 6.2 days, 10.97 GB. I have listened to most of it.
If someone wants to accuse us of eating coconut shells, then that's their business. We know what we're doing. - Achaan Chah
Not-Not-Not Your Academy
359 artists, 703 albums, 8734 songs.
24.5 days, a little over three weeks.
They're off the streets now, and back on the road on the riot trail. http://www.last.fm/user/sca_punk
Rage Prone Muso.
New playlist length - 10 weeks, 4 days, 11 hours, 41 minutes, and 4 seconds.
Size = 207GB
edited 7th Sep '10 12:10:41 PM by GuitarBizarre
"Worst thread plus Guitar Bizarre ———> Best thread" - Sporkaganza
A chub from the Grant Corporation
67 days. 54 minutes. 25 seconds.
Confirmed Bachelors: the dramedy hit of 1883!
Considering it's only an 8GB iPod: 2.3 days, 744 songs and growing
Mistress of headdesks and facepalms
About 36 hours so far. I've been trying to get rid of clutter.
Li'l Shardfinder
2 Days, 4.29 GB, 868 items (including non-music audio), 73 Artists, 109 Albums, 22 Genres. Basically still longer than this post.
You can not go to Utah again after you have eaten Utah and have not eaten.
I'm watching you. ಠ_ಠ
I only have around 1309 songs lasting 96.6 hours.
About 9 G Bs.
Education without values, as useful as it is, seems rather to make man a more clever devil. ~ C. S. Lewis
Lord of Bass
My iTunes library is 7.5 days, but that is only my tiny, inadequate hard drive, I'd assume that with all my C Ds, vinyls and extra mp3s, I'd probably be around 12-13 days.
And that's the end of that chapter.
3wk 6d 19:50:35
8967 tracks.
Creed of the Happy Pessimist:Always expect the worst. Then, when it happens, it was only what you expected. All else is a happy surprise.
15.3 days. I thought I had a lot till I saw this topic.
0
Street Writing Man
17 days, 9 hours, 20 minutes 37 seconds.
If I were to write some of the strange things that come under my eyes they would not be believed. ~Cora M. Strayer~
6705 songs, 11.9 days, 26.19 GB of music.