Same-sex marriage ceremonies began last night in Vermont. The new law took effect at midnight. Vermont is the first state to allow same-sex couples to marry through legislation rather than a court ruling. It was also the first state to establish civil unions as an option for same-sex couples (that was through legislation in response to a court case).

Here's a map and (not so readable) summary of the current status of gay marriage by state. More readable summary from Reuters.

Most enjoyable summary from Ben & Jerry's.