Tonight on ESPN, the 2012 NBA Draft Lottery will be held, and NBA commissioner David Stern will announce which teams will pick players in what order in the 2012 NBA Draft. From NBA.com:

This year will mark the ninth time in the event's 28-year history that it is conducted in New York City and first since May 23, 1993, when the drawing was held at the Sheraton New York. The inaugural lottery was held on May 12, 1985 at the Waldorf Astoria Hotel, but since 1994, the event had been held at the NBA Entertainment Studios in Secaucus, N.J. however the league's facilities in New Jersey no longer house a television studio.

The link above also provides a list of the teams in the lottery, and their chances for being drawn on the first ball. The Charlotte Bobcats have a 25% chance of being drawn, the Washington Wizards about a 20% chance, and so on down to the Houston Rockets, who have a 0.5% chance of coming out first.