From a press release issued by Daytona International Speedway:

Of the 37 riders on the 2004 Daytona 200 grid, there are 17 American states (California leads the way with six riders) and three different countries (United States, Australia, Canada) represented.

Number of qualified riders: 37

Of the five motorcycle manufacturers represented on the grid, there are:

27 Suzuki GSX-R1000s
4 Honda CBR1000RRs
4 Yamaha YZF-R1s
1 Ducati 999
1 Kawasaki ZX-10R

There are two former Daytona 200 winners in the field: Miguel Duhamel and Mat Mladin

There are three former AMA Superbike Champions in the field: Ben Bostrom, Duhamel and Mladin

Eric Bostrom winning the pole for the 2004 Daytona marks the first time brothers have earned the Daytona 200 pole position. Ben Bostrom sat on pole position in 2003.

The oldest rider in the field: Mike Sullivan, 47
The youngest rider in the field: Cory West, 19
The average age of the field: 32.3 years

Number of Daytona rookies in the field: 10
The highest-qualifying rookie: Jake Zemke, 5th