Interestingly, I was in the first round of Nexus 4 orders, and I grabbed a 16GB N4. I gave my wife my Samsung GS3, upgrading her from her Sensation, and was about to sell the Sensation on Swappa. It dawned on me that the Sensation has plenty of dual-core CPU, and with 768MB of ram, enough to run a large collection, so the hardware was already under my roof, and my next step was to wedge a linux distro onto it. I reviewed several sites:
http://sven-ola.dyndns.org/repo/debian-kit-en.html
was my first, and I tried the full Deb install first...it went without a hitch until some strange error about directory not found and hung. VNC wasn't getting in either, so I started from scratch. A link on that page above also gave me:
http://linuxonandroid.org/
http://linuxonandroid.org/complete-linu ... v2-beta-2/
I started with the Sensation rooted, EXT4 Recovery, and full factory reset. Added Astro/ES File manager, terminal app, and a couple VNC apps, since settings vary between them, and Complete Linux Installer APK, which wanted to update my busybox..I let it.
I was surprised Linux, and Ubuntu were already so far along in development...and this apk-as-toolkit speaks to me, as a Linux beginner (I only relearned wget and apt-get last night!). The latest APK of Complete Linux Installer V2 worked as advertised, and I got Ubuntu 12 running in no time...I was able to VNC right in and then downloaded openjdk and the Ubuntu Subsonic deb package. It all worked! There's only a few tunes on the phone now, and they stream perfectly (even no download 'blip' we see at that 20-25 second mark!), and I have over 130MB of ram left running both Ubuntu and Android, so I *think* I'll be fine once I complete the full project.
I ordered a micro-USB to USB with power splitter off of eBay (China airmail will take a few days), and then I hope to have both the WD Passport external drive AND the phone powered off a single wallwart, and finally have my low-power, quiet Subsonic Server solution.

http://www.ebay.com/itm/Micro-USB-OTG-H ... 2325ef96f1
And just after 3AM, I finally gave up with sweet success, only to wake up to even more good news:
http://www.pcmag.com/article2/0,2817,2413775,00.asp
We live in exciting times, if you're a geek. LOL!