Currently will probably only work during the Boston Music Hackday.
If you have a napster account, create a file that looks like this:
$ cat playdar-core/etc/napster.conf
[napster]
username=foo
password=bar
If you don't create this file then you will only be able to play 30 second streams.
To install, do something like this:
$ cd ~/playdar-core/contrib
$ ln -s ~/napsdar .
then edit etc/playdar.conf and add a section like this:
{scripts,[
"contrib/napsdar/napster_resolver.py"
]}.
If you run OSX or Linux, make sure /usr/bin/python exists. Suggestions welcome for setup on Windows.