Defunct URL shorteners:

    tr.im
    xs.md
    4url.cc
    litturl.com
    chod.sk - Appears non-incremental, not resolving
    gonext.org - not resolving
    ix.it - Not resolving
    jijr.com - Doesn't appear to be a shortener, now parked
    kissa.be - "Kissa.be url shortener service is shutdown"
    kurl.us - Parked.
    miklos.dk - Doesn't appear guessable: http://miklos.dk/!z7bA6a - "Vi arbejder på sagen..."
    minurl.org - Presently in ERROR 404
    muhlink.com - Not resolving
    myurl.us - cpanel frontend
    1link.in - Website dead
    canurl.com - Website dead
    dwarfurl.com - Website dead/Numeric, appears incremental: http://dwarfurl.com/08041
    easyuri.com - Website dead/Appears hex incremental with last digit random/checksum: http://easyuri.com/1339f , http://easyuri.com/133a3
    go2cut.com - Website dead
    lnkurl.com - Website dead
    minilien.com - Doesn't appear guessable: http://minilien.com/?9nyvwnA0gh - Website dead
    memurl.com - Pronounceable. Broken.
    nyturl.com - NY Times (bonus points for being longer than nyt.com, which they own). Taken by squatters
    digg.com - discontinued - [2]
    u.nu - "The shortest URLs. period." Website dead since at least 1st of october 2010 (http://web.archive.org/web/20100104023208/http://u.nu/)