See here

From the article;
If all goes well, the 1.2-ton craft will make 15 loops around the sun. It will swing by Earth again in August 2005, past Venus twice (October 2006 and June 2007) and by Mercury three times in 2008 and 2009 using planetary gravity to make a final orbital rendezvous. The roundabout route is geared to saving the cost and weight of the extra fuel required for a quicker trip of 3-months.
In March 2011, after a circuitous journey of 4.9 billion miles, it will slip into a nearly polar orbit of Mercury, swooping as low as 125 miles from the surface of the planet only half as big as Earth's moon.

Also Discovery is getting closer to launch.