Reduce that URL!

Enter a looooooooong URL ...

For example, turn this URL
http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=london&sll=51.530373,-0.096817&sspn=0.038658,0.076132&ie=UTF8&z=10&iwloc=addr

into this URL:
http://z6.co.uk/mmwxn3