If you want to donate to Sandy relief, you can do it here. Occupy has been very active in providing assistance, and it looks like they need money more than anything else at this point. They have an account for purchasing stuff from Amazon, but they've got most of the hard goods they need, and in some cases, people went overboard, giving them far more than they asked for.
Update: OccupySandy made the news last night. You can watch the piece here and then donate at the site above. You can also go to the Amazon registry and see what others have donated. Who had the good sense to realize that people needed clean underwear? Very cool.