President Bush lifted an executive ban on offshore drilling in the United States. (A ban, btw, that his father put into place.) The move, however, was mostly symbolic. Congress also has a ban on offshore drilling, and in order for the ban to be completely lifted, lawmakers have to get on board. Democrats, and even some Republicans (especially those from coastal states) don't seem too keen on the idea.
The news hasn't done much in terms of affecting stock prices for Big Oil companies (Exxon - XOM - is down; Chevron - CVX - is up), nor has it done much in terms of affecting crude oil prices. Indeed, even if Congress decides to move in lock step with President Bush, a big impact probably still won't be seen.
Offshore drilling wouldn't really change much in the energy landscape. Most economic and energy experts agree that lifting the ban would do little to impact current gas prices. Maybe nothing at all. Oil exploration and production takes time, so immediate results are not expected. Even the White House concedes that offshore drilling would do next to nothing in terms of immediately easing gas prices, though their rhetoric is that it might help eventually.