I accidentally released the 'calculate' command with the last update
of goosh.org.
The command may be still a little bit buggy, but now I think I can't
take it back.
So feel free to try the new command.

 Some examples:
calc 1+4*2
calc (1+4)*2

it took a long time but I finally released the sourcecode of goosh.org as open source.
You can find it here:
http://code.google.com/p/goosh/.
Directions to get the code via svn are at
http://code.google.com/p/goosh/source/checkout.
I released Goosh unter the Artistic License/GPL.

goosh.org is a command-line search-engine interface (mostly for google), that I wrote last year.

I would have included an iframe to test it right here, but posterous wont let me :(

So you have to follow the link to goosh.org.