According to Witold Fraczek (link to his discussion at http://www.esri.com/news/arcuser/0610/nospin.html), a day would last a whole year and the current centrifugal force causing the oceans to pond along the equator would no longer be in effect, so there would be land ranging all around the earth's equator separating two oceans at the poles. No more Great Lakes or Lake Bakal, no more Mediterranean beaches. And weather would be drastically effected, probably producing huge desert regions that dwarf the current Sahara and Gobi.