You can now grab your own IcePick and give it a whirl:

The website is:

http://fuseyism.com/hg/

where you can also grab tarballs. If you have Mercurial, all you have to do is:

hg clone http://fuseyism.com/hg/icepick

and let me know how you get on :)

Update

Thanks to Mark Wielaard, this has also been available on the IcedTea machine since last week:

hg clone http://icedtea.classpath.org/hg/icepick

There is also a wiki page:

http://icedtea.classpath.org/wiki/IcePick

Happy hacking!