Well I'll throw out some names that are lesser known from the 2004 MLB Draft, that are all in the Midwest League (Low A).
Matt Tuiasosopo - SS, though he could be moved to 3B later on - yep, he is the more known QB's brother. 3rd rd pick mainly due to him being a two way sports star and nobody knowing which he would choose, but the M's took a chance. Now he is making a name for himself, hitting .472 in his first 9 games w/ a 3BB/4K ratio.
Reid Brignac - same thing I said for Tui on his position - 2nd rd Rays pick, though he wasn't viewed as high by other teams ... TB was real high on him. So far he is showing a very polished approach at the plate with 9BB's in 12 games, also is hitting .326.
Eric Hurley - SP - The very last player taken in the 1st rd, was selected by the Rangers. He has a mid 90's FB/slider combination that so far is looking great. In his first 3 starts his era is 1.06, he has a whip under 1, and has K'd 19 in 17 innings.