From the Brewers Blog, Leyva hasn't been asked back for 2008.

For Nashville fans, the juicy bit comes at the end...

By all appearances, Leyva, 54, did a solid job as the Brewers' third base coach, so they probably have somebody else in mind for the job. The leading candidate probably is Frank Kremblas, who has managed Class AAA Nashville to the playoffs each of his three seasons with that club and is line for a promotion.

Personally, I can think of a of a few times were Leyva either sent a runner that he shouldn't have or vice versa, but I'm not sure if he's better or worse than the average base coach.