What Soap said.
I bought an iPod for the hardware.
I installed Rockbox for the software.
As for the battery, that bench page only has a couple 30 giggers on it (I know, I can fix that by adding mine... I really should do one of these). Once, maybe 2 months ago using Senab's build with the backlight off the whole time, I listened to almost exactly 6 hours of music (Within fifteen minutes either way) before the battery died. most of my music is 64 and 128kbps mp3s culled from various internet sources, with the occasional (say, 1 out of every 5) vbr mp3 ripped from a cd.