LEXINGTON, Ky. - The field for the 2008 Kentucky Derby is an eclectic bunch that represents all walks of equine life, from the inexpensive homebred to the pricey private purchase. At the time these runners were conceived, in 2004, their sires' fees ranged from $2,500 to $300,000. But there are common threads. For example, the overwhelming majority of the hopefuls, 15, were bred in Kentucky, and three Bluegrass farms stand more than one stallion with a Derby runner this year.